List of all species for which photographs are available.

Click “Yes in the second column to find both Photorecords and Annotated Species Pages.

Click “Yes” in the third column to find just the Annotated Species Pages.

Each photograph has an embedded label with plant name, location data, and photographer/collector. Geographical coordinates and elevations are from Google Earth

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Total Records Found: 936
SpeciesPhotoRecordsAnnotationFamilyCommonName
Abies bifolia [Abies lasiocarpa] [Abies arizonica] [Abies lasiocarpa var. arizonica] [Abies lasiocarpa var. bifolia] YES Mary E. McDonald: Conejos Co, 1 mile N of junction of Hwy 17 and FSR 118, 2 Aug 2022 Pinaceae Rocky Mountain subalpine fir, cork-bark fir
Abies concolor [Picea concolor] YES Rich Haswell: Rio Grande Co, FR 360 a third of a mile above Upper Beaver cpgd 10 June 2020 Pinaceae white fir
Acer glabrum [Acer neomexicanum] YES Rich Haswell: Rio Grande Co, Middle San Francisco Creek trailhea 30 Sept 2021 Sapindaceae Rocky Mountain maple
Achillea filipendulina [Achillea eupatorium] [Achillea filcifolia] [Tanacetum angulatum] YES Rebecca Husted Gimenez: Conejos, CO Antonito railway station grounds 10 Aug 2021 Asteraceae fernleaf yarrow, milfoil, nosebleed
Achillea millefolium [Achillea alpicola] [Achillea lanulosa] [Achillea laxiflora] etc. YES Rich Haswell: Rio Grande Co, 4 miles W of Summitville 8/6/2018 Asteraceae yarrow
Aconitum columbianum [Aconitum arizonicum] [Aconitum bakeri] [Aconitum lutescens], [etc.] YES Rich Haswell: Mineral Co, by old logging road below Big Meadows Reservoir 9 July 2020 Ranunculaceae monkshood
Actaea rubra [Actaea arguta] [Actaea viridiflora] YES Rich Haswell: Minteral Co, Shaw Lake 13 July 2020 Ranunculaceae red baneberry
Adoxa moschatellina YES Rich Haswell: See Annotated Page Yes Adoxaceae moschatel, muskroot, townhall clock, five-faced bishop, hollowroot
Agastache pallidiflora [Brittonastrum pallidiflorum] YES Mary E. McDonald: Conejos Co, bank of Rock Lake on Lake Fork below Platoro 7.27.2015 Lamiaceae giant hyssop
Ageratina herbacea YES Katherine Zybko, Saguache Co, east flank of Twin Mountain, 24 Sept 2023 Asteraceae snakeroot
Agoseris aurantiaca YES Rich Haswell: Rio Grande Co, south slope of Bennett Mountain, 7/22/2014; Grayback pass 8/23/2019 Asteraceae alpine dandelion
Agoseris glauca [Traximon glaucum] [Agoseris glauca var. dasycephala] YES Rich Haswell: Hinsdale Co, North Clear Creek Falls, 8 Aug 2015; Saguache Co, Luders Creek cpgd 21 Aug 2022 Asteraceae pale agoseris
Agoseris parviflora [Agoseris glauca var. lacinata] [Agoseris glauca var. parviflora] [Agoseris taraxacifolia] etc. YES Rich Haswell: Saguache Co, 2 miles E of North Crestone campground 13 June 2015 Asteraceae steppe dandelion
Alcea rosea [Althea rosea] YES Rich Haswell: Rio Grande Co, Del Norte street side, 17 Sept 2021 Malvaceae hollyhock
Aliciella penstemonoides [Gilia penstemonoides] [Gilia pentstemonoides] YES Rich Haswell: Mineral Co, Spring Gulch off Pool Table Road 30 July 2015 Polemoniaceae Black Canyon gilia
Aliciella pinnatifida [Gilia pinnatifida] YES Rich Haswell: Alamosa Co, Great Sand Dunes 6 June 2017 Polemoniaceae sticky gilia
Alisma gramineum [Alisma geyeri] [Alisma gramineum var. geyeri] YES Rich Haswell: Alamosa Co, Blanca Wetlands, in water and on shore of ponds 7/15/2017 Alismataceae Narrow-leaf water plantain
Alisma triviale [Alisma brevipes] [Alisma plantago-aquatica var. americanum] YES Rich Haswell: Saguache Co, Baca National Wildlife Refuge old irrigation ditch 8/17/2021 Alismataceae water plantain
Allium cernuum [Allium neomexicanum] [Allium recurvatum] YES Rich Haswell: Alamosa Co, Great Sand Dunes NP 29 Aug 2013 Alliaceae nodding onion
Allium geyeri var. geyeri [Allium funiculosum] YES: Richard Haswell, Mineral Co, trail to Hunters Lake, 2 July 2014; Rio Grande Co, Middle San Francisco Creek trailhead 24 June 2016 Alliaceae Geyer's onion
Allium geyeri var. tenerum [Allium rubrum] [Allium sabulicola] [Allium rydbergi] YES Rich Haswell: Mineral Co, CO ditch of old logging road below Big Meadows Reservoir 9 Sept 2020 Alliaceae bulbil onion, Geyer’s onion
Almutaster pauciflorus YES Rich Haswell: Saguache Co, Russell Lakes WPA, 18 Sept 2017; 15 Sept 2022 Asteraceae alkali marsh aster
Alnus incana [Betula alnus var. incana] YES Rich Haswell: Rio Grande Co, Del Norte, by Rio Grande 1 Aug 2016 Betulaceae grey alder, speckled alder
Alyssum desertorum YES Rich Haswell: Rio Grande Co, South Fork, vacant and parking lots 8 Sept 2017; 28 May 2019; 12 May 2021 Brassicaceae desert madword
Alyssum simplex [Alyssum parvifolium var. micranthum] [Alyssum minus var. micranthum] YES Rich Haswell: Rio Grande, South Fork, vacant lot in South Fork 28 May 2019 Brassicaceae European alyssum
Amaranthus albus [Amaranthus graecizans] [Amaranthus pubescens] YES Rich Haswell: Saguache Co, Old Woman Creek, dry slope with volcanic outcrops 26 Aug 2013 Amaranthaceae tumble pigweed
Amaranthus blitoides [Amaranthus graecizans] YES Rich Haswell: Rio Grande Co, Del Norte, at edge of dirt street 30 Aug 2021 Amaranthaceae spreading pigweed
Amaranthus hybridus YES Rich Haswell: Rio Grande Co, by CR 13 south of Del Norte 24 Sept 2022 Amaranthaceae smooth pigweed, green amaranth, slender pigweed, slim amaranth
Amaranthus powellii YES Rich Haswell: Rio Grande Co, Del Norte, by dirt street 4 Aug 2014; 3 Sept 2021 Amaranthaceae Powell’s pigweed
Amaranthus retroflexus YES Rich Haswell: Rio Grande Co, CR 13, 1 mile S of San Francisco Creek trailhead 3 Sept 2021; Del Norte street side 30 Sept 2022 Amaranthaceae redroot pigweed
Amauriopsis dissecta [Bahia dissecta] [Hymenothrix dissecta] [Bahia chrysanthemoides] [Villanova dissecta] etc. YES Rich Haswell: Rio Grande Co, beside highway on road to the Great Sand Dunes National Park 20 July 2021 Asteraceae yellow ragweed, ragleaf bahia
Ambrosia acanthicarpa [Franseria acanthicarpa] [Gaertneria acanthicarpa] YES Rich Haswell: Saguache Co, Great Sand Dunes NP, edge of parking lot 7/29/2019 Asteraceae sand bur, bursage, yerba del sapo
Ambrosia psilostachya YES Mary E. McDonald: Conejos Co, dam to Trujillo Reservoir 30 Aug 2022 Asteraceae Cuman ragweed, western ragweed
Ambrosia tomentosa [Franseria discolor] [Franseria tomentosa] [Gaertmeria tomentosa] YES Rich Haswell: Rio Grande Co, edge of pond in abandoned gravel pit 4 July 2022 Asteraceae skeletonleaf bur ragweed
Amelanchier alnifolia [Amelanchier canadensis var. pumila] [Amelanchier polycarpa] [Aronia alnifolia] YES Rich Haswell: Mineral Co, Big Meadows Reservoir 19 July 2017; Rio Grande Co, trail to quarry, E of Del Norte 27 May 2016 [var.pumila] Rosaceae western serviceberry, saskatoon, alder-leaf shadbush, western juneberry
Anaphalis margaritacea [Antennaria margaritacea] [Gnaphalium margaritaceum] etc. YES Rich Haswell: Rio Grande Co, Fuchs Reservoir 21 July 2014; Mineral Co, Big Meadows Reservoir 8 July 2020 Asteraceae pearly everlasting
Androsace chamaejasme [Androsace chamaejasme var. lehmanniana] [Androsace lehmanniana] YES Rich Haswell: Rio Grande Co, Grayback Mt 9 June 2014 Primulaceae alpine rock-jasmine
Androsace septentrionalis [Androsace diffusa] [Androsace glandulosa] etc. YES Rich Haswell: Mineral Co, Farmers Trail trailhead, dry outwash, 26 May 2021 Primulaceae northern rock-jasmine
Anemonastrum canadense [Anemone canadensis] [Anemonidium canadensis] YES mdaw: Costilla Co, west of Ft Garland, 8 July 2023 Ranunculaceae Canadian anemone
Anemone cylindrica Yes: pandarollie: Conejos Co, hillside above Sheep Creek, July 2021 Ranunculaceae candle anemone, thimbleweed
Anemone multifida [Anemone globosa] YES Rio Grande Co, CO Million Reservoir 28 Aug 2018 Ranunculaceae cutleaf anemone, Pacific anemone
Angelica grayi [Selinum grayi] YES Rich Haswell: Continental Divide north of Wolf Creek Pass 18 July 2014 Apiaceae Gray’s angelica
Antennaria anaphaloides [Antennaria pulcherrima var. anaphaloides] YES Rich Haswell: Rio Grande Co, Grayback pass 11 July 2018 Asteraceae pearly pussytoes
Antennaria corymbosa YES Rich Haswell: Rio Grande Co, Middle San Francisco Creek 4.5 miles from trailhead 5 June 2014 Asteraceae flat-top pussytoes
Antennaria marginata [Antennaria fendleri] [Antennaria peramoena] YES Mary E. McDonald: Conejos Co, forest opening 27 May 2014 Asteraceae whitemargin pussytoes
Antennaria media [Antennaria mucronata] [Antennaria umbrinella] YES Rich Haswell: Rio Grande Co, Grayback Pass, open subalpine meadow 5 Aug 2021 Asteraceae Rocky Mountain pussytoes
Antennaria microphylla [Antennaria obovata] YES Mary E. McDonald: Conejos Co near Conejos River and FSR 250, 18 July 2022, 8 Aug 2022; Rich Haswell: Saguache Co, near Luders cpgd 25 Aug 2021 Asteracea littleleaf pussytoes
Antennaria neglecta [Antennaria athabascensis] [Antennaria campestris] [Antennaria erosa] [Antennaria howellii subsp. neglecta] [etc.] YES: Mary E. McDonald, Conejos Co, on the Conejos River just below Spectacle Lake, July 4 and 6, 2023. Asteraceae field pussytoes
Antennaria parvifolia [Antennaria aprica] [Antennaria latisquamea] YES Rich Haswell: Saguache Co, Poso cpgd, 11 air miles SW of La Garita elev. 9,200, 2 July 2019 Asteraceae small-leaf pussytoes
Antennaria rosea [Antennaria formosa] [Antennaria imbricata] [Antennaria arida] YES Rich Haswell: Mineral Co, Hunters Lake, 11 air miles SW of South Fork 2 July 2014 Asteraceae red pussytoes
Antennaria rosulata [Antennaria sierrae-blancae] YES Rich Haswell: Rio Grande Co, Bear Creek trailhead meadow, 4 June 2018 Asteraceae Kaibab pussytoes, silvery pussytoes
Anticlea elegans [Zigadenus elegans] [Zigadenus coloradoensis] [Zigadenus dilatatus] YES Rich Haswell: Rio Grande Co, near Elwood pass 2 Sept 2019 Melanthiaceae mountain death-camas, elegant camas
Aphyllon fasciculatum [Orobanche fasciculata] Thalesia fasciculata] [Thalesia lutea] YES Rich Haswell: Rio Grande Co, Elephant Rocks north of Del Norte 2 June 2015 Orobanchaceae clustered broomrape
Aphyllon ludovicianum [Orobanche ludoviciana] [Orobanche corymbosa subsp. mutabilis] [Aphyllon arenosa] [Myzorrhiza ludoviciana] YES Carol English: Saguache Co, along Liberty Road in the Great Sand Dune National Monument 7/14/2021 [see Colorado Native Plant Society listserve for 15 July2021] Orobanchaceae Louisiana broomrape
Apocynum androsaemifolium [Apocynum androsaemum] [Apocynum scopulorum] [Apocynum ambigens] YES Rich Haswell: Rio Grande Co, Trout Creek trail, SW of South Fork, 5 July 2017 Apocynaceae spreading dogbane
Apocynum cannabinum [Apocynum angustifolium] [Apocynum hypericifolium] etc. YES Rich Haswell: Alamosa Co, Alamosa NWR, 11 Aug 2016; Mineral Co, junction of Hwt 160 and FSR 11, 6 July 2016) Apocynaceae Indian hemp, dogbane
Aquilegia caerulea [Aquilegia coerulea] YES Rich Haswell: Rio Grande Co, Elwood Pass, 2 Sept 2019 Ranunculacea blue columbine
Aquilegia elegantula YES Rich Haswell: Rio Grande Co, Middle San Francisco Creek trailhead 16 June 2019 Ranunculaceae red columbine
Arabis pycnocarpa [Arabis ovata] [Arabis hirsuta var. pycnocarpa] YES Rich Haswell: Mineral Co, Shaw Lake 6 July 2015 Brassicaceae hairy rockcress
Arctostaphylos uva-ursi [Arbutus uva-ursi] [Daphnidostilis fendleriana] YES Rich Haswell: Saguache Co, Cochetopa pass 16 Sept 2015 Ericaceae bearberry, kinnikinnick
Arenaria lanuginosa [Spergulastrum lanuginosum] YES Rich Haswell: Mineral Co, Shaw Lake 22 June 2016 Caryophyllaceae spreading sandwort
Arnica chamissonis [Arnica foliosa var. chamissonis] YES Mary E. McDonald: Conejos Co, between Mogote and Aspen Glad cpgds 8-9 June 2022 Asteraceae Chamisso's arnica
Arnica cordifolia [Arnica paniculata] YES Rich Haswell: Rio Grande Co, 0.5 miles E of Elwood pass 2 Aug 2019 Asteraceae heartleaf arnica
Arnica latifolia YES Rich Haswell: Conejos Co, 1 mile S of Elwood pass beside CR 380, 2 Sept 2019 Asteraceae broadleaf arnica
Arnica mollis YES Rich Haswell: Rio Grande Co, natural pond on CR 14 elev. 11,250' 14 July 2020 Asteraceae hairy arnica
Arnica parryi [Arnica angustifolia subsp. eradiata] YES Rich Haswell: Mineral Co, Continental Divide trail just north of Wolf Creek Pass, 6 Aug 2014 Asteraceae Parry’s arnica
Artemisia biennis YES Rich Haswell: Saguache Co, Russell Lakes SWA, 8 Sept 2017; Rio Grande Co, dryig edge of Beaver Creek Reservoir 2 Sept 2020 Asteraceae biennial wormwood
Artemisia borealis [Artemisia campestris subsp. borealis] [Artemisia campestris subsp. pacifica] [Artemisia campestris var. purshii][Oligosporus pacificus] [Oligosporus groenlandicus] YES Patrick Alexander Conejos Co, just west of Conejos Peak (2 July 2018), and southwest of Elwood pass (4 July 2018) Asteraceae boreal sagewort
Artemisia campestris subsp. caudata [Artemisia campestris var. caudata] [Artemisia caudata] [Artemisia forwoodii] [Oligosporus caudatus] YES? Rich Haswell: Saguache Co, 2.6 miles west of Poso cpgd 14 July 2021 Asteraceae field sagewort
Artemisia campestris subsp. pacifica [Artemisia campestris var. pacifica] [Artemisia campestris var. pacifica] [Artemisia campestris var. scouleriana] [Artemisia pacifica] [Artemisia campestris var. petiolata] [Artemisia scouleriana] [Oligospours pacificu YES Rich Haswll: Rio Grande Co, east of Del Norte 15 Aug 2017 Asteraceae field sagewort
Artemisia cana [Artemisia viscidula] [Seriphidium canum] Yes Kenneth Bader: Alamosa Co, Great Sand Dunes NPP, 19 Aug 2014 Asteraceae silver sagebrush
Artemisia carruthii [Artemisia kansana] [Artemisia wrightii] YES Rich Haswell Rio Grande Co, Middle San Francisco Creek, by trailhead, 10 miles S of Del Norte 15 Aug 2016 Asteraceae Carruth’s sagebrush
Artemisia dracunculus [Artemisia dracunculina] [Artemisia dracunculoides] [Artemisia glauca] YES Rich Haswell: Rio Grande Co, Del Norte, within town limits, beside street, 20 July 2020 Asteraceae wild tarragon, wormwood, dragon sagewort
Artemisia franserioides YES Rich Haswell: Mineral Co, Shaw Lake, 31 July 2017 Asteraceae ragweed sagebrush, bursage mugwort
Artemisia frigida YES Rich Haswell: Conejos Co, San Luis Hills 28 July 2021 Asteraceae fringed sagewort, estafiata, arctic sage, pasture sage
Artemisia longifolia [Artemisia vulgaris var. longifolia] [Artemisia natronensis] YES Rich Haswell: Alamosa Co, Alamosa National Wildlife Preserve, 11 Aug 2016 Asteraceae longleaf wormwood
Artemisia ludoviciana [Artemisia vulgaris var. ludoviciana] YES Rich Haswell: Rio Grande Co, Del Norte, by bridge over the Rio Grande 1 Aug 2016 Asteraceae silver wormwood, Louisiana wormwood, western mugwort, gray sagewort
Artemisia michauxiana [Artemisia vulgaris var. michauxiana] [Artemisia discolor] YES Rich Haswell: Mineral Co, Willow Creek above Creede, in scree 2 Aug 2021 Asteraceae Michaux’s wormwood, lemon sagewort
Artemisia norvegica [Artemisia norvegica var. saxitilis] [Artemisia arctica] [Artemisia norvegica subsp. saxitilis} YES Rich Haswell: Rio Grande Co, Grayback pass 5 Aug 2021 Asteraceae mountain sagewort
Artemisia nova [Artemisia arbuscula subsp. nova] [Artemisia tridentata var. nova] [Seriphidium novum] YES Mary E. McDonald: Conejos Co, three miles S of Hwy 17, 28 Aug 2022 Asteraceae black sageberush
Artemisia scopulorum YES Rich Haswell: Rio Grande Co, south slope of Bennett Mt 22 July 2014 Asteraceae alpine sagebrush
Artemisia tridentata [Seriphidium tridentatum] [Artemisia tridentata var. vaseyana] YES Rich Haswell: Saguache Co, .0.25 miles S of Poncha Pass, 17 May 2021 (var. vaseyana) Asteraceae big sagebrush
Asclepias hallii YES Rich Haswell: Saguache Co, 10 miles E of North Pass, 11 July 2015; Rio Grande Co, CR 630, 3 miles N of CR 15, 29 June 2021 Asclepiadaceae Hall’s milkweed
Asclepias speciosa YES: Rich Haswell: Saguache Co, Russell Lakes SWA 7 Aug 2018; Rio Grande Co, Del Norte strleelt side (seeds dehiscing) 10 Oct 2022 Asclepiadaceae common milkweed
Asparagus officinalis YES Rich Haswell: Rio Grande Co, Del Norte, streetside, 6 June 2014; Russell Lakes SWA 8 Sept 2017 Asparagaceae asparagus
Astragalus agrestis [Astragalus goniatus] YES Rich Haswell: Conejos Co, ridge above Hicks Canyon 23 June 2021 Fabaceae purple milkvetch
Astragalus allochrous [Astragalus wootonii] YES Mary E. McDonald: Conejos Co, near Mogote, 26 June 2023 Fabaceae Wooton’s milkvetch
Astragalus alpinus YES Rich Haswell: Mineral Co, 1.6 air miles NW of Creede 18 Aug 2022 Fabaceae Alpine milkvetch
Astragalus amphioxys [Xylophacos amphioxys] YES Rich Haswell: Rio Grande Co, meadowy ridge above Pinos Creek 13.25 air miles SW of Del Norte 17 June 2020 Fabaceae crescent milkvetch
Astragalus bisulcatus var. haydenianus [Astragalus haydenianus] Fabaceae Hayden’s milkvetch
Astragalus canadensis [Astragalus oreophilus] YES Katherine Zybko Saguache Co, north boundary of the Great Sand Dunes NPP, 31 July 2021 Fabaceae Canadian milkvetch
Astragalus ceramicus YES Rich Haswell: Saquache Co, base of volcanic dyke, BLM road 231, 17 June 2027 Fabaceae painted milkvetch
Astragalus cerussatus YES Rich Haswell: Rio Grande Co, Del Norte, alongside gravel driveway, in flower 27 March 2021 Fabaceae powdery milkvetch
Astragalus cicer YES Rich Haswell: Mineral Co, East Willow Creek above Creede 20 Sept 2016 Fabaceae chickpea milkvetch
Astragalus drummondii YES Rich Haswell: Costilla Co, Trinchera Ranch SW of Fort Garland 10 June 2015 Fabaceae Drummond’s milkvetch, locoweed
Astragalus flexuosus YES Rich Haswell: Rio Grande Co, Middle San Francisco Creek trailhead 16 July 2021 Fabaceae slender milkvetch
Astragalus hallii YES Rich Haswell: Rio Grande Co, Middle San Francisco Creek trailhead 3 July 2016; Mary McDonald: Coneos Co, 3 km south of Fox Creek Community, 14 July 2018 Fabaceae Hall’s milkvetch
Astragalus laxmannii [Astragalus adsurgens var. robustior] YES Rich Haswell: Rio Grande Co, quarry trail east of del Norte 11 June 2019 Fabaceae Laxmann’s milkvetch
Astragalus lonchocarpus YES Rich Haswell: Rio Grande Co, Schroeder Creek, 14 June 2014 (flowering); Rio Grande Co, Groundhog Road 26 July 2019 (fruiting) Fabaceae great rushy milkvetch
Astragalus miser YES Rich Haswell: Saguache Co, North Cochetopa pass 22 June 2017 Fabaceae forest milk-vetch
Astragalus multiflorus [Astragalus tenellus] [Ervum multiflorum] YES Rich Haswell: Saguache Co, near Moon pass 14 July 2021 Fabaceae looseflower milkvetch
Astragalus parryi YES Richard Haswell: Saguache Co, top of Poncha pass 8 June 2023 Fabaceae Parry’s milkvetch
Astragalus ripleyi YES Rich Haswell: Conejos Co, near Hicks Canyon, open meadow, 23 June 2021 Fabaceae Ripley’s milkvetch
Astragalus scopulorum [Tium scopulorum] Yes Alec McKeand Saguache Co, 12 km northwest of Villa Grove, 18 May 2022 Fabaceae Rocky Mountain milkvetch
Astragalus sericoleucus YES Richard Haswell: Costilla Co, between San Luis and the Rio Grande 21 June 2023 Fabaceae silky milkvetch
Astragalus shortianus YES Rachel Hosna: Saguache Co, northwest of Saguache 22 May 2023 Fabaceae Short’s milkvetch, early purple milkvetch
Atriplex canescens [Atriplex angustior] [Calligonum canescens] [Obiome occidentalis var. canescens] YES Haswell: Rio Grande Co, Del Norte street side 19 July 2013 Amaranthaceae fourwing saltbush
Atriplex dioica [Atriplex subspicata] [Atriplex patula subsp. subspicata] YES Rich Haswell: Russell Lakes SWA, junction of Hwy 285 and CR N, in ditch, 9/26/2019 Amaranthaceae thickleaf orach
Atriplex hortensis YES Rich Haswell: Rio Grande Co, Del Norte, in floodplain of the Rio Grande, 2 Aug 2015; 5 Oct 2017; 4 Oct 2022; Amaranthaceae garden orache
Atriplex micrantha [Atriplex heterosperma] YES Rich Haswell: Saguache Co, Baca NWR 17 Aug 2021; Rio Grande Co, Del Norte, 18 Sept 2018, 9 Sept 2022; Saguache Co, Russell Lakes NWA 26 Sept 2019; Rio Grande Co, by parking lot of the Family Dollar store in Del Norte, 2 Aug 2022 Amaranthaceae twoscale saltbrush, Russian atriplex
Atriplex wolfii [Obione wolfii] YES Rich Haswell: Saguache Co, Russell Lakes WPA 9 Sept 2022 Amaranthaceae Wolf's saltbrush, slender orache
Axyris amaranthoides Linnaeus YES Rich Haswell: Mineral Co, 1.6 air miles NW of Creede, 18 Aug 2022 Amaranthaceae Russian pigweed
Barbarea orthoceras YES Rich Haswell: Mineral Co, by Hwy 160 just east of Wolf Creek pass 13 Aug 2014 Brassicaceae American yellowrocket
Bassia hyssopifolia [Kochia hyssopifolia] [Suaeda hysspifolia] YES Rich Haswell: Great Sand Dunes 8 July 2014; Russell Lakes SWA 8 Sept 2016 Yes Amaranthaceae ironweed, smotherweed, five-hook
Bassia scoparia [Bassia sieversiana] [Kochia scoparia] [Kochia sieversiana] [Chenopodium scoparium] YES Rich Haswell: Russell Lakes SWA 8 Sept 2017 Yes Amaranthaceae burningbush, kochia, alfalfa de pobre, morenita, Mexican fireweed
Berberis fendleri [Mahonia fendleri] YES Rich Haswell: Rio Grande Co, Million Reservoir in fruit 26 Aug 2018 Berberidaceae Fendler’s barberry
Berberis repens [Mahonia repens] [Berberis aquifolium var. repens] [Berberis nana] [Odostemon repens] YES Rich Haswell: Rio Grande Co, Bear Creek trailhead 13 air miles SW of Del Norte 30 May 2014. Berberidaceae Oregon grape, creeping mahonia, creeping barbary
Berteroa incana YES Rich Haswell: Rio Grande Co, South Fork 28 July 2013, Aug 2022 Yes Brassicaceae hoary alyssum
Berula erecta [Berula incisa] [Sium erectum] [Sium incisum] YES Rich Haswell: Saguache Co, Russell Lakes SWA, by an old irrigation ditch, 8 Sept 2017 Apiaceae cutleaf waterparsnip
Bidens cernua [Bidens glaucescens] [Bidens prionophylla] YES Rich Haswell: Alamosa Co, Blanca Wetlands 30 Aug 2017 Asteraceae nodding beggarticks
Bidens frondosa [Brachyacaulis frondosus] YES Rich Haswell: Alamosa Co, Blanca Wetlands, by pond 15 Aug 2017; 18 Sept 2020 Asteraceae devil’s beggarticks
Bidens tenuisecta [Bidens cognata] YES Rich Haswell: Rio Grande Co, meadow by Rio Grande slough near Del Norte 11 Aug 2018; Rio Grande Co, Del Norte streert side, 6 Sept 2023 Asteraceae slimlobe beggarticks
Bidens tripartita [Bidens comosa] YES Rich Haswell: Mineral Co, Shaw Lake dried margin 8 Aug 2014 Asteraceae strawstem beggarticks
Bistorta bistortoides [Polygonum bistortoides] YES Rich Haswell: Rio Grande Co, saddle between Poison Mountain and Bennett Peak 19 June 2017 Polygonaceae American bistort, smokeweek, mountain meadow knotweed
Bistorta vivipara [Polygonum viviparum] YES Rich Haswell Rio Grande Co, natural pond on CR 14, elev 11,150', 23 Aug 2019 Polygonaceae alpine bistort
Blitum capitatum subsp. capitatum [Blitum capitatum] [Chenopodium capitatum] YES Rich Haswell: Mineral Co, Pool Table Road elev 9,500, 1 Aug 2014 Amaranthaceae strawberry blite
Blitum capitatum subsp. hastatum [Blitum hastatum] Blitum capitatum subsp hastatum] [Blitum capitatum] [Chenopodium capitatum var. parvicapitatum] [Chenopodium overi] YES Rich Haswell: Mineral Co, CO below Big Meadows Reservoir 8 July 2020 Amaranthaceae strawberry-blite, beetberry
Blitum nuttallianum [Monolepis nuttalliana] YES Rich Haswell, Mineral Co, 1 mile SE of Creede, 2 Aug 2021 Amaranthaceae povertyweed
Boechera centrifendleri YES Patrick Alexander: Conejos Co, 9 km southwest of Capulin, 6 June 2021 Brassicaceae ?
Boechera fendleri [Arabis fendleri] [Arabis holboellii var. fendleri] YES Rich Haswell: Rio Grande Co, San Francisco Cr trailhead 31 July 2016 See Annotated Page Yes Brassicaceae Fendler’s rockcress
Boechera grahamii [Arabis divaricarpa] [Boechera divaricarpa] [Arabis holboellii] [Boechera pinetorum] [etc.] YES Rich Haswell: Rio Grande Co, river walk by Del Norte, floodplain of the Rio Grande 20 May 2019 (flowering); 11 July 2021 (fruiting) Brassicaceae Graham’srockcress
Boechera oxylobula [Arabis demissa] [Boechera demissa] YES Rich Haswell: Rio Grande Co, 10 miles S of Del Norte, 6 May 2022 Yes Brassicaceae Glenwood Springs rockcress
Boechera retrofracta [Arabis holboellii var. retrofracta] [Boechera holboellii var. retrofracta] [Arabis arcuata] [etc.] YES Rich Haswell: Saguache Co; Crestone Lake trail E of Crestone, open mixed conifer woods, 13 June 2015 Yes Brassicaceae reflexed rockcress
Boechera sanluisensis [Boechera fendleri] Yes: Patrick Alexander: Rio Grande Co, butte near Limekiln Peak, 20 June 2021 Brassaciceae San Luis rock cress
Boechera spatifolia [Arabis fendleri var. spatifolia] [Arabis holboellii var. fendleri] [Boechera fendleri var. spatifolia] YES Patrick Alexander: Rio Grande Co, south of Del Norte, 12 June 2008; Rich Haswell: Saguache Co, Poso cpgd, 2 July 2019 Yes Brassicaceae spoonleaf rockcress
Boechera stricta [Arabis drummondii] [Arabis oxyphylla] [Arabis connexa] [Erysimum drummondii] [etc.] YES Rich Haswell: Rio Grande Co, meadow by Bear Creek trailhead 17 June 2019 Yes Brassicaceae Drummond’s rockcress
Brassica rapa [Brassica campestris] [Sinapsis pekinensis] YES Rich Haswell: Rio Grande Co, CO yard of house in Del Norte 31 July 2022 Brassicaceae field mustard, rapeseed
Brickellia eupatorioides [Kuhnia eupatorioides] YES Rich Haswell: Saguache Co, by road, near La Garita 24 July 2020 Yes Asteraceae false boneset
Brickellia grandiflora [Coleosanthus grandiflora] [Coleosanthus petiolaris] [Eupatorium grandiflorum] YES Rich Haswell: Mosca Cr., Alamosa Co, rocky slope by trail, 28 July 2017 Yes Asteraceae tasselflower brickellbush
Brickelliastrum fendleri [Brickellia fendleri] [Coleosanthus ambigens] [Steviopsis fendleri] YES Mary E. McDonald Hicks Canyon, Conejos Co, 30 July 2023 Asteraceae Fendler's brickell-bush
Callitriche hermaphroditica [Callitriche autumnales] YES Rich Haswell: Rio Grande Co, Million Reservoir 8/28/2018; Rio Grande Co, pond in old gravel pit NE of Del Norte 8/22/2021 Plantaginaceae northern water starwort
Callitriche heterophylla YES Mary E. McDonald: Conejos Co, between La Manga and Cumbres passes, Rio de los Pinos 11 Sept 2021 Plantaginaceae two-headed water-starwort
Callitriche palustris [Callitriche verna] YES Rich Haswell: Mineral Co, Tucker Ponds 8 Sept 2018 Plantaginaceae water starwort
Calochortus gunnisonii YES Mary E. McDonald: Conejos Co, on the Conejos River 9 July 2014; Rich Haswell: Alamosa Co, Mosca Pass 9 July 2014 Liliaceae Gunnison’s mariposa lily
Caltha chionophila [Caltha leptosepala] [Psychrophila leptosepala]v[Caltha biflora] [Caltha howellii] [Caltha uniflora] YES Rich Haswell: Rio Grande Co, Grayback pass snow-melt seep 23 Aug 2019 Ranunculaceae marsh marigold
Calypso bulbosa [Calypso americana] YES Rich Haswell: Mineral Co, Shaw Lake (in flower) 8 June 2018 Orchidaceae Calypso orchid, fairy slipper, Venus slipper
Camelina microcarpa YES Rich Haswell: Saguache Co, FR 740 off of Hwy 14, beside dirt road 26 Aug 2021 Brassicaceae littlepod false flax
Campanula parryi YES Rich Haswell: Saguache Co, meadow E of Luders Creek cpgd 26 Aug 2021 Campanulaceae Parry’s bellflower
Campanula rapunculoides YES Rich Haswell: Rio Grande Co, Del Norte, house 20 June 2020 Campanulaceae creeping bellflower
Campanula rotundifolia [Campanula petiolata] YES Rich Haswell: Rio Grande Co, CO Grayback Mt scree slope 6 Aug 2016 Campanulaceae harebell, bluebell bellflower, Scottish bluebell
Campanula uniflora [Melanocalyx uniflora] YES Mary E. McDonald Conejos Co, confluence of Los Pinos and Cumbres creeks 26 Aug 2018 Campanulaceae Arctic bellflower, Arctic harebell
Capsella bursa-pastoris [Bursa bursa-pastoris] [Thlaspi bursa-pastoris] YES Mary E. McDonald Conejos Co above Magote Cpgd 8 June 2016; Rich Haswell: Rio Grande Co, town of Del Norte, untended yard, 30 May 2021 Brassicaceae shepherd's purse
Caragana arborescens YES Mary E. McDonald: Conejos Co, Hicks Canyon by old homestead, 18 July 2014 (in fruit), 12 June 2015 (in flower) Fabaceae Siberian pea, Sibernian pea shrub
Cardamine cordifolia YES Rich Haswell: Rio Grande Co, trailhead of Crystal Lake on CR 380, 5 Aug 2016 (fruiting) Brassicaceae heartleaf bittercress
Carduus nutans [Carduus theormeri] YES Rich Haswell: Luders Creek, 1 m. below Luders Cpgd 15 Sept 2015; Beaver Cr campground W of South Fork 12 July 2017 Asteraceae musk thistle
Carum carvi YES Rich Haswell: Rio Grande Co, Del Norte house, 29 May 2015 Apiaceae caraway
Castilleja integra [Castilleja gloriosa] YES Rich Haswell: Rio Grande Co, Lookout Mountain Del Norte 10 June 2019 Orobanhaceae [Scrophulariaceae] wholeleaf paintbrush
Castilleja linariifolia [Castilleja linarifolia] YES Rich Haswell: Mineral Co, Deep Creek trail S of Creede 11 Aug 2020 Orobanhaceae [Scrophulariaceae] narrowleaf paintbrush, Wyoming paintbrush
Castilleja lineata YES Rich Haswell: Rio Grande Co, Pinos Creek, 1 mile into San Juan National Forest 29 July 2014; Rio Grande Co, meadow SE of Lower Beaver Creek cpgd, 16 July 2022 Orobanhaceae [Scrophulariaceae] marshmeadow paintbrush
Castilleja miniata [Castilleja confusa] [Castilleja crista-galli] [Castilleja inconstans] [Castilleja trinervis] YES Rich Haswell: Rio Grande Co, Bear Creek trail S of Del Norte 4 June 2018 Orobanhaceae [Scrophulariaceae] greater red paintbrush, giant red paintbrush
Castilleja occidentalis YES Rich Haswell: Rio Grande Co, near Elwood pass 2 Sept 2019 Orobanhaceae [Scrophulariaceae] western paintbrush
Castilleja rhexiifolia [Castilleja oregonensis] YES Rich Haswell:Rio Grande Co, 2 miles S of Grayback Mt. 30 June 2017; Grayback pass 6 July 2022 Orobanhaceae [Scrophulariaceae] splitleaf paintbrush
Castilleja septentrionalis [Castilleja sulphurea] [Costilleja rhexifolia var. sulphurea] [Castilleja luteovirens] YES Rich Haswell Mineral Co Shaw Lake 9 July 2020 Orobanhaceae [Scrophulariaceae] sulphur paintbrush
Castilleja septentrionalis x Castilleja rhexiifolia [Castilleja versicolor] YES Rich Haswell: Rio Grande Co, San Francisco Lakes, S of Del Norte 13 Aug 2008 Orobanhaceae [Scrophulariaceae] [no common name]
Ceanothus fendleri YES Rich Haswell, Mineral Co, hillside along Embargo Road, NW of South Fork, 26 July 2016 Rhamnaceae Fendler’s buckthorn, Fendler’s buckbrush
Ceanothus velutinus YES B. Moore Costilla Co, east of Forbes Park 23 Sept 2023 Rhamnaceae snowbrush ceanothus, tobacco bush, sticky laurel, redroot
Centaurea diffusa YES Randy Floyd: Rio Grande Co, CO southwest of South Fork along Hwy 160, 21 Aug 2019 Asteraceae diffuse knapweed
Centaurea stoebe subsp. micranthos YES Rich Haswell: Saguache Co, cattle-grazed meadow by Baughman Creek 10.27 air miles NE of South Fork, 25 Sept 2019; Rio Grande Co, Middle San Francisco Creek, 24 Sept 2022 Asteraceae spotted knapweed
Cerastium arvense [Cerastium oreophilum] [Cerastium scopulorum] [Cerastium strictum] YES Rich Haswell: Mineral Co, Lime Creek trailhead 12 July 2016 Caryophyllaceae field chickweed
Cerastium beeringianum YES Rich Haswell: Rio Grande Co, Grayback pass 5 Aug 2021 Caryophyllaceae Bering chickweed
Cerastium fontanum subsp. vulgare [Cerastium vulgatum] YES Rich Haswell: Rio Grande Co, San Francisco Cr 5 June 2014; Mineral Co, Tucker Ponds 23 July 2019 Caryophyllaceae mouse-ear chickweed
Cercocarpus montanus [Cercocarpus argenteus] [Cercocarpus parvifolius] YES Rich Haswell: Saguache Co, Penitente Canyon 26 May 2018 Rosaceae alderleaf mountain majogany
Chaenactis douglasii [Chaenactis douglasii var. douglasii] [Chaenactis douglasii var. alpina] [Chaenactis leucopsis] [Chaenactis alpina] YES Rich Haswell: Saguache Co, Old Cochetopa pass 10 July 2015 Asteraceae Douglas’s dustymaiden, dusty-maidens
Chaetopappa ericoides YES Rich Haswell: Rio Grande Co, quarry trail E of Del Norte 24 June 2017; Conejos Co, Hicks Canyon N of Hwy 17 23 June 2021 Asteraceae rose heath
Chamaenerion angustifolium [Chamerion angustifolium subsp. circumvagum] [Epilobium angustifolium] YES Rich Haswell: Mineral Co, Hope Creek on Shaw Lake road 23 Aug 2013 Onagraceae narrow-leaf fireweed, rosebay willowherb
Chenopodiastrum simplex [Chenopodium simplex] YES Rich Haswell: Rio Grande Co, Del Norte, edge of flower garden 30 July 2017 Yes Amaranthaceae maple-leaf goosefoot
Chenopodium album YES Rich Haswell: Rio Grande Co, Del Norte 19 July 2015; 22 July 2017 Yes Amaranthaceae lambsquarter, fat hen
Chenopodium atrovirens YES Rich Haswell: Rio Grande Co, Del Norte, 10 July 2021 See Annotated Page Yes Amaranthaceae pinyon goosefoot
Chenopodium berlandieri YES Rich Haswell, Mineral Co, 2 miles S of Creede, 23 July 2020; Rio Grande Co, Del Norte street side 18 Sept 2022 Yes Amaranthaceae pitseed goosefoot
Chenopodium fremontii YES Rich Haswell: Alamosa Co, Great Sand Dunes NM, 29 July 2019 Yes Amaranthaceae forest goosefoot
Chenopodium incanum [Chenopodium fremontii var. incanum] Yes "macho mel": Rio Grande Co, by Hwy 160 between Monte Vista and Alamosa 25 Aug 2019 Amaranthaceae mealy goosefoot
Chenopodium leptophyllum [Chenopodium album var. leptophyllum] [Chenopodium oblongifolium] YES Rich Haswell: Conejos Co, San Luis Hills, on bare hilltops along Hwy 128 and CR V, 28 July2021 Yes Amaranthaceae narrowleaf goosefoot
Chenopodium pratericola [Chenopodium desiccatum] YES Rich Haswell: Rio Grande Co, Del Norte by Hwy 160, 15 Aug 2014 Yes Amaranthaceae desert goosefoot
Chenopodium watsonii [Chenopodium glabrescems] YES Rich Haswell: Rio Grande Co, Lookout Mt just SW of Del Norte, 8 Aug 2014; Elephant Rocks N of Del Norte 2 Oct 2018; Saguache Co, Saguache town park, 28 July 2020 Yes Amaranthaceae stinky goosefoot
Cherleria obtusiloba [Minuartia obtusiloba] [Lidia obtusiloba] [Arenaria obtusiloba] [Arenaria sajanensis?] YES Rich Haswell: Rio Grande Co, Grayback pass 13 Aug 2020 Caryophyllaceae alpine stitchwort
Chionophila jamesii YES Rich Haswell: Rio Grande Co, near Grayback pass 20 July 2015 Plantaginaceae Rocky Mountian snowlover
Chondrophylla fremontii [Gentiana fremontii] [Chondrophylla aquatica] YES Mary E. McDonald: Conejos Co, along the Conejos River, in "the hidden mile," by Forest Service Road 250, 21 March 2014 Gentianaceae moss gentian
Chondrophylla prostrata [Gentiana prostrata] YES Rich Haswell: Rio Grande Co, Grayback pass 23 Aug 2019 Gentianaceae Siberian gentian
Chorispora tenella YES Rich Haswell: Rio Grande Co, Del Norte stree verges 8 May 2019 Yes Brassicaceae blue mustard, musk mustard, cross flower
Chrysothamnus depressus [Ericameria depressa] YES Mary E. McDonald, Conejos Co, FSR 103(1) C, 4 Sept 2021 Asteraceae dwarf rabbitbrush
Chrysothamnus greenei [Bigelowia greeenei] [Ericameria filifolia] YES Rich Haswell: Alamosa Co, Alamosa NWR 11 Sept 2016; Saguache Co, Baca NWR, inside refuge and beside Hwy 17, 17 Sept 2021 Asteraceae Greene’s rabbitbrush
Chrysothamnus vaseyi [Bigelowia vaseyi] [Chrysothamnus bakeri] [Ericameria vaseyi] YES Mary E. McDonald: Conejos Co, 8 miles E of Antonito 14 Oct 2022 Asteraceae Vasey’s rabbitbrush
Chrysothamnus viscidiflorus [Crinitaria viscidiflora] YES Rich Haswell: Rio Grande Co, Del Norte street side 4 Sept 2019 Asteraceae yellow rabbitbrush
Cichorium intybus YES Mary E. McDonald, Conejos Co, along Hwy 17, 10 July 2014; Rich Haswell: Conejos Co, road to Terrace Reservoir 26 July 20192019) Asteraceae chickory, cornflower
Cicuta maculata [Cicuta douglasii, misidentified] YES Rich Haswell: Rio Grande Co, Monte Vista National Wildlife Refuge, 7 July 2016 Apiaceae spotted water hemlock, cowbane, suicide root
Circaea alpina YES Rich Haswell, Rio Grande Co, SW of South Fork 31 July 2018 Yes Onagraceae small enchanter’s nightshade
Cirsium americanum [Cirsium scariosum var. americanum] [Cirsium tioganum] [Cirsium acaulescens] [Cirsium coloradense subsp. acaulescens] [Cirsium drummondii var. acaulescens] YES Rich Haswell: Mineral Co, Hunters Lake, 11 miles SW of South Fork, 19 June 2017 Asteraceae meadow thistle, stemless thistle, dinnerplate thistle
Cirsium arvense [Breea arvense] YES Rich Haswell: Rio Grande Co, South Fork, vacant lot, 4 Sept 2013; 8 miles S of Del Norte by CR 13 23 Aug 2020 Asteraceae creeping thistle, field thistle, Canadian thistle
Cirsium canescens YES Mary E. McDonald: Conejos Co, near FS 103 (2)B, around 8,300' elev, sunny grassland 1 Aug 2021 Asteraceae creamy thistle
Cirsium coloradense [Scariosum scariosum var. coloradense] YES Rich Haswell: Rio Grande Co, Groundhog road, off Embargo Creek 23 July 2016 Asteraceae meadow thistle, Colorado thistle
Cirsium funkiae [Cirsium scopulorum] YES Rich Haswell: Rio Grande Co, San Francisco Lakes 13 Aug 2008; peak of Grayback Mountain 21 Aug 2014 Asteraceae no name as yet
Cirsium hesperium [Cirsium eatonii var. hesperium] [Cirsium scopulorum] [Cirsium eatonii var. eriocephalum] YES Rich Haswell: Mineral Co, Willow Creek above Creede 4 July 2014 Asteraceae Eaton’s thistle
Cirsium ochrocentrum [Carduus ochrocentrus] [Cnicus neomexicanus] YES Rich Haswell: Saguache Co, Natural Arch south of La Garita, 17 July 2013; Rio Grande Co, Church Creek near South Fork, 19 July 2020 Asteraceae yellowspine thistle
Cirsium parryi [Carduus pallidum] [Carduus gilensis] [Carduus parryi] etc. YES Rich Haswell: Mineral Co, Deep Creek trail, SW of Creede 11 Aug 2020 Asteraceae Parry’s thistle
Cirsium tracyi [Cirsium undulatum, var. tracyi] [Carduus tracyi] YES Mary E. McDonald: Conejos Co Gulch near FSR 103.2B, 4 Aug 2021 Asteraceae Tracy’s thistle
Cirsium undulatum [Cirsium megsacephalum] [Carduus megacephalus] [Carduus undulatus] YES Rich Haswell: Alamosa Co, CO Great Sand Dunes July 2013, July 2022 Asteraceae wavyleaf thistle
Cirsium vulgare YES Mary E. McDonald, Conejos Co, near the confluence of the Conejos River and Fox Creek 2 Aug 2015;2 Sept 2015 Asteraceae bull thistle
Claytonia megarhiza [Claytonia arctica var. megarhiza] YES Rich Haswell: Rio Grande Co, saddle between Poison and Bennett Peaks 19 June 2017 Montiaceae alpine springbeauty
Claytonia rosea [Claytonia lanceolata var. rosea] YES Craig Martin: Alamosa Co, top of Mosca pass 9 June 2023 Montiaceae western springbeauty
Clematis columbiana [Atragene columbiana] [Atragene pseudoalpina] [Clematis pseudoalpina] YES Rich Haswell: Rio Grande Co, Lost Lake, 18 June 2014 Ranunculaceae rock clematis
Clematis hirsutissima var. scottii [Clematis scottii] [Coriflora hirsutissima] [Coriflora scottii] YES Rich Haswell: Rio Grande Co, San Francisco Cr trailhead S of Del Norte 26 July 2017 Ranunculaceae Scott’s hairy clematis, Scott’s sugarbowl clematis
Clematis ligusticifolia [Clematis neomexicana] YES Rich Haswell: Rio Grande Co, Del Norte flood plain of the Rio Grande on the "river walk", 16 June 2020 Ranunculaceae western white clematis, virgin’s bower, old man’s beard, devil's thread, pepper vine, etc.
Clematis orientalis YES Rich Haswell: Rio Grande Co, Monte Vista, Dos Rios Restaurant 18 July 2013; Del Norte street side Aug 2015 to 29 Sept 2022 Ranunculaceae oriental clematis, orangepeel clematis
Collomia linearis [Gilia linearis] [Navarretia linearis] YES Mary E. McDonald: Conejos Co, near the Conejos River between Mogote and Aspen Glade campgrounds 16 July 2021 Polemoniaceae tiny trumpet, narrow-leaf mountain-trumpet
Comandra umbellata [Thesium umbellatum] YES Rich Haswell: Rio Grande Co, Del Norte, by Rio Grande 10 June 2015 to 21 June 2022 Comandraceae bastard toadflax
Comarum palustre [Potentilla palustris] Yes Mary E. McDonald: Conejos Co, 1 mile W of La Manga pass 6 Aug 2016; natural pond at Cumbres Pass 15 July 2022; Rich Haswell: natural pond at Cumbres pass 2 Aug 2022 Yes Rosaceae purple marshlocks
Comastoma tenellum [Gentiana tenella] [Gentianella tenella] YES Rich Haswell: Mineral Co, Alberta Peak 28 July 2016 Gentianaceae Lapland gentian
Commelina dianthifolia [Commelina linearis var. longispatha] Yes Rachel Hosna: Saguache Co, 0.6 mile west of Penitente Canyon cpgd 7 Aug 2022 Commelinaceae birdbill dayflower
Conioselinum scopulorum [Ligusticum scopulorum] YES Rich Haswell: Mineral Co, below Big Meadows Reservoir 9 July 2020 Apiaceae hemlock parsley
Conium maculatum YES Mary E. McDonald: Conejos Co, on the Conejos River between Mogote and Aspen Glade cpgd 23-28 July 2017 Apiaceae poison hemlock
Convolvulus arvensis [Convolvulus ambigens] YES Rich Haswell: Rio Grande Co, Del Norte house 18 June 2013 Convolvulaceae field bindweed, morning glory, withy wind, creeping jenny, devil's guts
Corallorhiza maculata [Cladorhiza maculata] YES Rich Haswell: Mineral Co, Big Meadows Reservoir (in flower) 17 July 2015 Orchidaceae spotted coralroot
Corallorhiza striata [Cladorhiza striata] YES Rich Haswell: Alamosa Co, Mosca Creek 28 July 2017 Orchidaceae striped coralroot
Corispermum villosum [Corispermum emarginatum] [Corispermum orientale var. emarginatum] YES Rich Haswell: Alamosa Co, the Great Sand Dunes NP 13 Sept 2017 Amaranthaceae hairy bugseed
Cornus sericea var. sericea [Cornus alba var. alba] [Cornus stolonifera] YES Mary McDonald: Conejos Co, forest bench of the Conejos River SW of Fox Creek Community 11 June2014; Contributor: Conejos Co, along Conejos River July 2021 Cornaceae red-osier dogwood
Corydalis aurea subsp. aurea YES Rich Haswell: Saguache Co, Luders Creek campground 17 July 2016 Yes Fumariaceae golden smoke, scrambled eggs
Corydalis aurea subsp. occidentalis [Corydalis aurea subsp. curvisiliqua] YES Rich Haswell: Rio Grande Co, Del Norte alley verge 24 May 2014 yes Fumariaceae golden smoke, scrambled eggs
Corydalis caseana YES Rich Haswell: Mineral Co, Big Meadows Reservoir 7/27/2016 yes Fumariaceae Sierra fumewort
Cosmos parviflorus [Coreopsis parviflor[ YES Mary E. McDonald: Conejos Co, by HWY 17, E end of Los Mogotes 19 Aug 2016 Asteraceae southwestern cosmos, juve, aceitilla blanca
Crassula aquatica [Tillaea aquatica] YES Rich Haswell: Rio Grande Co, by and in pond of an unused gravel pit NW of Del Norte 29 Aug 2020; 14 Sept 2020; 18 Sept 2022 Yes Crassulaceae pigmyweed
Crataegus rivularis YES Rich Haswell: Alamosa Co, Mosca Cr 9 July 2014 Rosaceae river hawthorn
Crepis acuminata YES Rich Haswell: Bauchmann Creek northeast of South Fork 25 Sept 2019 Asteraceae tapertip hawksbeard
Crepis runcinata [Psilochenia runcinata] [Crepis neomexicana] [Crepis perplexans] [Crepis petiolata] YES Rich Haswell: Saguache Co, Russell Lakes State SWA 8 Sept 2017 Asteraceae fiddleleaf hawk's-beard
Cryptantha fendleri [Cryptantha pattersonii] [Krynitzkia fendleri] YES Rich Haswell: Rio Grande Co, Ridge E of Elephant Rocks, 21 Aug 2017 Boraginaceae sanddunes catseye
Cryptantha minima YES Mary E. McDonald: Conejos Co, confluence of Rio de los Pinos and Cumbres Cr 20 May 2020 Boraginaceae little catseye
Cyclachaena xanthiifolia [Cyclachaena xanthifolia] [Iva xanthiifolia] YES Mary E. McDonald: Conejos Co, 2 miles S of Los Mogotes cpgd 16 Aug 2020; Rich Haswell: Conejos Co, by Hwy 17 just E of Fox Creek community 2 Aug 2022 Asteraceae marsh elder, giant sumpweed, careless-weed
Cycloloma atriplicifolium [Salsola atriplicifolia] [Salsola platyphylla] YES Rich Haswell, Alamosa Co, Great Sand Dunes NP, 18 July 2020 Amaranthaceae winged pigweed
Cymopterus alpinus [Oreoxis alpina] YES Rich Haswell: Rio Grande Co, saddle between Poison and Bennett Peaks 19 June 2017 Apiaceae alpine parsley
Cymopterus glomeratus [Cymopterus acaulis] [Cymopterus fendleri] [Thapsis glomerata] YES Kay Crowder Alamosa Co, western city limits of Alamosa, 30 April 2023; Josh Felton, Saguache Co, near Creston 17 May 2023 Apiaceae spring parsley
Cymopterus lemmonii [Thaspium montanum] [Pseudocymopterus montanus] [Pseudocymopterus filicinus] [Pseudocymopterus multifidus] etc. [ YES Rich Haswell: Mineral Co, by junction of CR 380 and Hwy 160 10 June 2020 Apiaceae mountain parsley
Cynoglossum officinale YES: Mary McDonald, Archuleta Co, near Cumbres pass, 2021; Mele Avery, Saguache Co, Valley View Hot Springs, 2022 Boraginaceae houndstongue
Dactylorhiza viride [Coeloglossum viride] [Habenaria viridis] [Orchis verescens] [Satyrium viride] YES Rich Haswell: Mineral Co, in Watershed, elev. 9,000-10,000’, 26 June 2013 to 13 Aug 2018 Yes Orchidaceae long-bracted bog orchid, frog orchid
Dalea leporina [Dalea alba] [Dalea alopecuroides] [Psoralea leporina] YES Mary E. McDonald: Conejos Co, between Hwy 17 and the Conejos River at Los Mogotes 27 Aug 2018; 22 Sept 2018 Fabaceae foxtail prairie clover
Dasiphora fruticosa [Dasiphora floribunda] [Pentaphylloides fruticosa] [Pentaphylliodes floribunda] [Pentaphylloides floribunda] [Potentilla floribunda] [Potentilla fruticosa] YES Rich Haswell: Mineral Co, Wagon Wheel Gap 14 Aug 2016 Rosaceae shrubby cinquefoil
Delphinium alpestre Yes Jennifer Ackerfield: Costilla Co, near Trinchera Peak, 8 Aug 2018 Ranunculaceae Colorado larkspur
Delphinium barbeyi [Delphinium cockerellii] [Delphinium exaltatum var. barbeyi] [Delphinium occidentale] etc. YES Rich Haswell: Rio Grande Co, near Elwood pass 2 Sept 2019 Yes Ranunculaceae subalpine larkspur, Barbey's larkspur
Delphinium ramosum YES Rich Haswell: Mineral Co, Pool Table Road, open meadow 30 July 2015 Yes Ranunculaceae mountain larkspur
Delphinium robustum [Delphinium ramosum] YES Rich Haswell: Saguache Co, vicinity of Old Cochetopa pass 17 July 2016 Yes Ranunculaceae Wahatoya Creek larkspur, robust larkspur
Descurainia californica [Smelowskia californica] YES Rich Haswell: Mineral Co, CO just N of Lobo overlook of Wolf Creek pass 6 Aug 2014 Brassicaceae Sierra tansymustard
Descurainia incana [Descurainia richardsonii] [Sisymbrium incanum] [Sophia procera] YES Rich Haswell: Rio Grande Co, Grayback Pass, road side, fruit partially dehisced 8/5/2021 Brassicaceae mountain tansy mustard
Descurainia incisa [Descurainia richardsonii subsp. incisa] [Sisymbrium incisum] [Sophia incisa] YES Richard Haswell: Rio Grande Co, Grayback Mt. 22 May 2018 Brassicaceae cutleaved tansymustard
Descurainia kenheilii YES Scott F. Smith San Juan Co, 1 mile east of Stony pass 22 Jul 2021 Brassicaceae Heil’s tansymustard
Descurainia longepedicellata [Descurainia incisa var. filipes] [Sisymbrium incisum var. filipes] [Sisymbrium longepedicellatum] YES Rich Haswell: Rio Grande Co, 5 miles W of Del Norte road side 5 Aug 2016 Brassicaceae narrow tansymustard
Descurainia pinnata [Descurainia ramosissima] [Erysimum pinnatum] YES Rich Haswell: Saguache Co, natural pond above Luders Creek cpgd 25 Aug 2021 Brassicaceae Villa Grove tansymustard
Descurainia sophia YES Rich Haswell: Rio Grande Co, Del Norte lot by Hwy 160, 4 May 2021 (young plant) Brassicaceae flixweed, herbe-Sophia, tansy
Dieteria bigelovii [Machaeranthera bigelovii] [Machaeranthera aquifolia] [Machaerathera pattersonii] [Aster aquifolia] [Machaeranthera rubricaulis] etc.. YES Rich Haswell: Mineral Co Beaver Reservoir SW of South Fork Beside parking lot 2 Sept 2020 Asteraceae Bigelow’s false tansyaster
Dieteria canescens [Machaeranthera canescens] [Machaeranthera viscosa] [Machaeranthera linearis] [Aster canescens] etc. YES Rich Haswell: Rio Grande Co, by railroad tracks 2 miles E of Del Norte 20 Aug 2020 Asteraceae hoary false tansyaster, sand daisy
Dodecatheon pulchellum [Primula pauciflora] [Exinia pulchella] YES Mary E. McDonald: Conejos Co, wetlands by FSR 113, 19 July 2015; Rich Haswell: Saguache Co, Poso Creek 2 July 2019 Primulaceae darkthroat shooting star, southern shooting star
Draba albertina YES Mary E. McDonald Conejos Co near La Manga pass 27 June 2023 Brassicaceae slender draba, slender whitlow-grass
Draba aurea [Draba leiocarpa] YES Rich Haswell: Rio Grande Co, Grayback Mt head of road to radio tower 12 Aug 2020 Brassicaceae golden draba
Draba crassa YES Rich Haswell: Rio Grande Co, 0.6 miles SE of the Elwood Cabin 2 Sept 2019 Brassicaceae thickleaf draba
Draba crassifolia YES Rich Haswell: Rio Grande Co, Grayback Mt 23 Aug 2019 Brassicaceae snowbed draba
Draba helleriana [Draba neomexicana] [Draba pallida] [Draba patens] etc. YES Rich Haswell: Rio Grande Co, saddle between Poison and Bennett Peaks 19 June 2017 Brassicaceae Heller’s draba
Draba rectifructa [Draba montana] YES Rich Haswell: Saguache Co, Poso cpgd, west of La Garita 3 July 2019 Brassicaceae mountain draba
Draba smithii YES Carold English, Saguache Co, north Cristos at a high elevation [other location information protected] Brassicaceae Smith’s draba
Draba spectabilis YES Rich Haswell: Rio Grande Co, near Elwood pass 2 Aug 2019 Brassicaceae showy draba
Draba streptobrachia [Draba spectabilis var. dasycarpa] YES Rich Haswell: Rio Grande Co, Grayback Mt 14 July 2015 Brassicaceae alpine tundra draba
Draba streptocarpa [Draba tonsa] YES Rich Haswell: Rio Grande Co, Saddle between Poison and Bennett Peaks 19 June 2017 Brassicaceae pretty draba
Dracocephalum parviflorum [Moldavica parviflora] YES Rich Haswell: Rio Grande Co, San Francisco Cr 1 July 2020 Lamiaceae American dragonhead, dragonhead mint
Drymocallis arguta [Potentilla arguta] [Drymocallis convallaria] YES Rich Haswell: Rio Grande Co, Upper Beaver Creek cpgd 12 July 2017 Rosaceae tall cinquefoil
Dysphania graveolens [Dysphania incisa] [Teloxys graveolens] [Chenopodium graveolens] YES Rich Haswell, Rio Grande Co, north South Fork on terrace above the Rio Grande, 12 Sept 2017; Alamosa Co, S of Great Sand Dune NP, 20 July 2021 Amaranthaceae fetid goosefoot
Dyssodia papposa [Boebera papposa] [Tagetes papposa] YES Rich Haswell: Saguache Co, by CR A32 (Old Woman Creek road) 23 Aug 2014 Asteraceae fetid marigold
Echinocereus coccineus [Echinocereus triglochidiatus var. melanocanthus] [Triglochidiatus coccineus] [Cereus coccineus] [Echinocereus conoides] etc. YES Rich Haswell: Rio Grande Co, Base of volcanic dyke BLM rd 231, 16 June 2017 Yes Cactaceae claret-cup cactus
Echinocereus triglochidiatus [Echinocereus mojavensis] YES Rich Haswell: see Annotated Page. Yes Cactaceae king’s crown, claret cup
Echinocereus viridiflorus [Cereus chloranthus] [Echinocereus chloranthus] etc. YES Rich Haswell: Saguache Co, Biedell Creek, 27 May 2019 Yes Cactaceae pitaya cactus, nylon hedgehog cactus
Elaeagnus angustifolia YES Rich Haswell: Rio Grande Co, Del Norte street side 4 June 2020 Caprifoliaceae Russian olive
Elaeagnus commutata [Elaeagnus argentea] YES Daniel Boyes: Conejos Co, Conejos River southwest of Mogote, 19 Aug 2022 Caprifoliaceae silverberry
Elodea bifoliata [Elodea longivaginata] YES Richard Haswell: Sherman Lake E of Monte Vista, submerged and floating 24 Sept 2020 Hydrocharitaceae twoleaf waterweed
Elodea canadensis [Elodea planchonni] [Anacharis canadensis] [Philotria] YES Rich Haswell: Mineral Co, Tucker Ponds, emersed and floating 10 Sept 2021; Million Reservoir 22 Sept 2020 Hydrocharitaceae Canadian waterweed
Epilobium anagallidifolium [Epilobium alpinum] YES Rich Haswell: Rio Grande Co, Grayback pass 11 July 2018 Onagraceae pimpernel willowherb
Epilobium brachycarpum [Epilobium paniculatum] [Epilobium adenocladon] YES Rich Haswell: Alamosa Co, Blanca Wetlands 15 July 2017 Onagraceae tall willowherb
Epilobium ciliatum YES Rich Haswell: Rio Grande Co, roadside seep near Crystal Lakes 14 July 2020 Onagraceae fringed willowherb, American willowherb
Epilobium clavatum [Epilobium alpinum var. clavatum] [Epilobium glareosum] YES Rich Haswell: Rio Grande Co, Grayback Mountain edge of talus slope 20 July 2015 Onagraceae talus willowherb
Epilobium hallianum [Epilobium halleanum] YES Rich Haswell: Conejos Co, Rio del los Pinus at inlet to Trujillo Meadows Reservoir 3 Aug 2020 Onagraceae Hall’s willowherb
Epilobium hornemannii YES Rich Haswell: Mineral Co, Lake Fork trail at Hwy 160 11 Aug 2014 Onagraceae Hornemann’s willowherb
Epilobium oregonense YES Mary E. McDonald: Conejos Co, pond at Cumbres pass 24 July 2022 Onagraceae Oregon willowherb
Epilobium saximontanum [Epilobium drummondii] [Epilobium ovatifolium] YES Rich Haswell: Rio Grande Co, 0.5 miles S of Grayback Pass, wet meadow 5 Aug 2021 Onagraceae Rocky Mountain willowherb
Epipactis gigantea YES Scott F. Smith: Saguache Co, Valley View Hot Springs 4 July 2021 Orchidaceae stream orchid, broadleaf helleborine
Eremogone fendleri [Arenaria fendleri] YES Rich Haswell: Rio Grande Co, saddle just W of Del Norte 22 May 2021 Caryophyllaceae Fendler’s sandwort
Ericameria discoidea [Macronema discoidea] YES Joseph Kleinkopf: Saguache Co, CO near top of Simmons Peak 10 Aug 2022 Asteraceae whitestem goldenbush
Ericameria nauseosa [Chrysothamnus nauseosus] YES Rich Haswell: Rio Grande Co, Del Norte street side 16 Aug 2019 Asteraceae rubber rabbitbrush
Ericameria parryi [Chrysothamnus parryi] [Linosysris parryi] YES Rich Haswell: Rio Grande Co, Middle San Francisco Creek trailhead 20 Aug 2021 Asteraceae Parry’s rabbitbrush
Erigeron canadensis [Conyza canadensis] YES Rich Haswell: Saguache Co, Russell Lakes WP 22 July 2016; Rio Grande Co, abandoned gravel pit one mile NE of Del Norte 27 July 2021 Asteraceae horseweed
Erigeron canus [Wyomingia cana] YES Rich Haswell: Rio Grande Co, Alder Creek N of South Fork, meadow 8 July 2019 Asteraceae hoary fleabane
Erigeron compositus YES Rich Haswell: Rio Grande Co, Grayback Mountain tundra 5 Aug 2021 Asteraceae alpine daisy
Erigeron concinnus [Erigeron pumilus subsp. concinnoides] [Erigeron setulosus] [Distasis concinna] YES Rich Haswell: Rio Grande Co, gravel pit 1.5 air miles NE of Del Norte 20 June 2021 Asteraceae Navajo fleabane
Erigeron coulteri YES Janis E. Haswell: Rio Grande Co 0.5 miles S of Grayback pass, meadow 5 Aug 2021 Asteraceae Coulter’s daisy
Erigeron divergens [Erigeron accedens] [Erigeron incomptus] [Erigeron wootonii] YES Rich Haswell: Rio Grande Co, gravel pit 1.5 air miles NE of Del Norte 6/20/2021; Del Norte, crack in sidewalk of downtown street 24 May 2017 Asteraceae spreading fleabane
Erigeron eatonii YES Rich Haswell: Rio Grande Co, SE end of Beaver Creek Reservoir, open ground 7 July 2020 Asteraceae Eaton’s fleabane
Erigeron elatior [Erigeron grandiflorus var. elatior] YES Rich Haswell: Saguache Co, Cochetopa Pass, 10 July 2015; Rio Grande Co, Grayback Mountain 23 June 2020 Asteraceae tall fleabane
Erigeron eximius [Erigeron superbus] YES Rich Haswell: Saguache Co, Luders Creek Campground 26 Aug 2021 Asteraceae daisy fleabane
Erigeron flagellaris [Erigeron conmixtus] [Erigeron divergens var. nudiflorus] [Erigeron macdougalii] etc. YES Rich Haswell: Rio Grande Co, Del Norte house 12 July 2020 Asteraceae whiplash fleabane
Erigeron formosissimus [Erigeron diminutus] [Erigeron mogollonicus] [Erigeron pecosensis] [Erigeron smithii] YES Rich Haswell: Rio Grande Co, Middle San Francisco Creek, 10 miles S of Del Norte 2 July 2021 Asteraceae beautiful fleabane
Erigeron glabellus YES Rich Haswell: Conejos Co, where Hwy 142 crosses the Conejos River, meadow above river 7/28/2021; Mineral Co, Tucker Ponds 10 Sept 2021 Asteraceae streamside fleabane
Erigeron glacialis [Erigeron peregrinus] [Aster glacialis] [Erigeron callianthemus] etc. YES Rich Haswell: Mineral Co, Poage Lake, 12 air miles SW of South Fork 11 July 2016 Asteraceae glacial fleabane
Erigeron grandiflorus [Erigeron simplex] [Erigeron leucotrichus] [Erigeron uniflorus] YES Rich Haswell: Rio Grande Co, tundra, Grayback pass 21 Aug 2014, 16 Aug 2017; 8 July 2019 Asteraceae Rocky Mountain alpine daisy
Erigeron leiomerus YES Rich Haswell: Grayback Mt, in rock outcrops along the radio-tower road to the peak 21 Aug 2014 Asteraceae rockslide fleabane
Erigeron lonchophyllus [Trimorpha lonchophylla] [Erigeron minor] YES Rich Haswell: Saguache Co, FR 740 one mile S of Hwy 14, 26 Aug 2021 Asteraceae long-leaved fleabane
Erigeron melanocephalus [Erigeron uniflorus var. melanocephalus] YES Rich Haswell: 0.5 mile E of Elwood Pass, trail to Crystal Lake 2 Aug 2019 Asteraceae blackheaded fleabane
Erigeron philadelphicus YES Rich Haswell: Rio Grande Co, parking area of store in Del Norte on Hwy 160, 31 Aug 2022 Asteraceae Philadelphia fleabane
Erigeron pinnatisectus [Erigeron compositus var. pinnatisectus] YES Rich Haswell: Grayback Pass, on rocky knoll near the Summitville Road and the radio-tower utility road 8 July 2019 Asteraceae pinnate-leaf fleabane
Erigeron pumilus YES Mary E. McDonald: Conejos Co, beside Hwy 17 near community of Fox Creek, 17 June 2016 Asteraceae shaggy fleabane
Erigeron speciosus [Erigeron leptophyllus] [Erigeron micranthus] [ YES Rich Haswell: by natural pond along CR 14 at about 11,250' elevation 14 July 2020 Asteraceae aspen fleabane
Erigeron subtrinervis [Erigeron bakeri] YES Mary E. McDonald: Conejos Co, Conejos River 2 miles upstream from Mogote cpgd; Rich Haswell: Rio Grande Co, Middle SanFrancisco Creek trailhead 2 July 2021 Asteraceae three-veined fleabane
Erigeron tracyi [Erigeron colomexicanus] [Erigeron conmixtus] [Erigeron divergens var. cinereus] YES Rich Haswell: Mineral Co, dry shelf by Shaw Lake 9 July 2020 Asteraceae Tracy’s daisy
Erigeron ursinus YES Rich Haswell: Rio Grande Co, CO Grayback Mountain 20 July 2015 Asteraceae Bear River fleabane
Erigeron vagus YES Scott F. Smith, San Juan Co, Stony pass, 22 July 2021 Asteraceae rambling fleabane
Erigeron vetensis YES Rich Haswell: Rio Grande Co, Bear Creek 1.5 miles NE of South Fork 7 June 2021 Asteraceae early blue-top fleabane
Eriogonum alatum [Pterogonum alatum] YES Rich Haswell Alamosa Co, mile S of toll gate for the Great Sand Dunes NP 20 July 2021 Polygonaceae winged buckwheat
Eriogonum arcuatum [Eriogonum bakeri] YES Rich Haswell: Farmers Trail trailhead S of Creede, 21 May 2021 Polygonaceae Baker’s wild buckwheat, smartweed buckwheat
Eriogonum cernuum YES Rich Haswell: Rio Grande Co, by CR 15A north of Del Norte 21 Aug 2020 Polygonaceae nodding buckwheat
Eriogonum effusum YES Rich Haswell: Rio Grande Co, 8 miles W of Del Norte, meadow slope 18 Aug 2017 Polygonaceae spreading buckwheat
Eriogonum flavum [Eriogonum polyphyllum] YES Rich Haswell: Mineral Co, Deep Creek trail S of Creede 11 Aug 2020 Polygonaceae golden buckwheat, Piper's buckwheat
Eriogonum jamesii YES Rich Haswell: Rio Grande Co, foothills just S of Del Norte 3 Aug 2020 Polygonaceae James’ buckwheat
Eriogonum lachnogynum YES Rich Haswell: Rio Grande Co, ridge by Twelvemile road E of CR 38A 12 June 2021 Polygonaceae woollycup buckwheat
Eriogonum microthecum YES Rich Haswell: Conejos Co, Terrace Reservoir 26 July 2019 Polygonaceae slender buckwheat
Eriogonum racemosum YES Rich Haswell: Conejos Co, Terrace Reservoir 26 July 2019 Polygonaceae redroot buckwheat
Eriogonum umbellatum YES Kevin Reilly: Conejos Co, Rio de los Pinos below Osier Station 21 June 2021 Polygonaceae sulphur-flower buckwheat
Eritrichium nanum [Eritrichium argenteum] [Eritrichium aretioides var. elongatum] [Eritrichium elongatum] YES Rich Haswell: Rio Grande Co, last slope before peak of Grayback Mountain 21 Aug 2014 Boraginaceae Arctic alpine forget-me-not, king-of-the-Alps
Erodium cicutarium [Geranium cicutarium] YES Rich Haswell: house yard in Del Norte 15 July 1203. Yes Geraniaceae common stork’s-bill, redstem filaree, pinweed
Erysimum capitatum [Cheiranthus aridus] [Cheirinia arida] [Cheirinia asperrimas] etc. YES Rich Haswell: Rio Grande Co, Alder Creek N of South Fork 8 July 2019 Brassicaceae sanddune wallflower
Erysimum cheiranthoides YES Rich Haswell: Mineral Co, Big Meadows Reservoir 6 July 2016 Brassicaceae wormseed wallflower, treacle-mustard
Erysimum repandum YES Rich Haswell: Rio Grande Co, base of Limekiln Peak, between Monte Vista and Del Norte, along a hiking and biking trail, 6 July2021; Lookout Mt by Del Norte, by trail 10 July 2021 Brassicaceae spreading wallflower
Erythranthe guttata [Mimulus guttatus] [Mimulus puberulus] YES Rich Haswell: Conejos Co, top of Trujillo Reservoir 3 Aug 2020 Phrymaceae seep monkeyflower, common monkeyflower
Erythranthe minor [Erythranthe tilingii ][Mimulus tilingii] [Mimulus minor] YES: Loraine Yeatts Conejos Co, flank of Conejos Peak 7 Aug 2008 Phrymaceae Tiling’s monkeyflower
Escobaria vivipara [Pelecyphora vivipara] [Coryphantha vivipara] [Cactus vivipara] [Mammillaria vivipara] etc. YES Rich Haswell: Rio Grande Co, Ridge E. of Elephant Rocks 26 June 2015 Yes Cactaceae nipple cactus
Euphorbia brachycera [Tithymalus brachycera] [Euohorbia montana] [Euphorbia odontadenia] [Euphorbia robusta] etc. YES Rich Haswell: Alamosa Co, Great Sand Dunes NP 8 June 2017 Euphorbiaceae horned spurge
Euphorbia cyparissias [Tithymalus cyparissias] YES Mary E. McDonald: Conejos Co, 1.5 miles upstream from Mogote Campground 5 Sept 2015; 4 Sept 2021 Euphorbiaceae Cypress spurge
Euphorbia glyptosperma [Chamaesyce glyptosperma] YES Rich Haswell: Rio Grande Co, foothill trail 0.6 miles S of Del Norte 23 Sept 2021 Euphorbiaceae ridge-seed sandmat
Euphorbia marginata [Dichrophyllum marginatum] [Lepadinia marginata] YES Susan Lamb: Costilla Co, San Luis, 10 Aug 2021 Euphorbiaceae snow-on-the-mountain
Euphorbia serpyllifolia [Euphorbia serpillifolia] [Chamaesyce serpyllifolia] YES Rich Haswell: Rio Grande Co, by parking lot of restaurant in South Fork 27 Sept 2021 Euphorbiaceae thymeleaf sandmat
Fallugia paradoxa [Fallugia micrantha] [Sieversia paradoxa] YES Rich Haswell: Conejos Co, San Luis Hills, 2 miles NE of Flat Top mesa, in association with Tetradymia canescens, Eriogonum cernuum, Opuntia polycantha, typical sagebrush community 28 July 2021 Rosaceae Apache plume, ponil
Fragaria vesca [Fragaria vesca subsp. americana] [Fragaria bracteata] [Fragaria americana] YES Mary E. McDonald Conejos Co, 2 miles W of Fox Creek 2 Aug 2013 Rosaceae wild strawberry, woodland strawberry
Fragaria virginiana [Fragaria firma] [Fragaria glauca] YES Rich Haswell: Mineral Co, Big Meadows Reservoir 17 July 2015 Rosaceae Virginia strawberry
Frasera speciosa YES Rich Haswell: Mineral Co, Shaw Lake (in flower) 22 June2016 Gentianaceae monument plant
Fraxinus americana [Fraxinus biltmoreana] YES Rich Haswell: Rio Grande Co, Del Norte, yards 2018-2022 Oleaceae American ash
Gagea serotina [Lloydia serotina] [Bulbocodium serotinum] YES Matt Gerber: Continental Divide trail near Mt Hope 18 June 2017 Liliaceae common alplily, Snowdon's alplily
Gaillardia aristata YES Pandarollie: Conejos Co, above La Jara Creek 25 km southwest of La Jara, July 2021 Asteraceae blanketflower
Gaillardia pulchella [Gaillardia neomexicana] Yes Rich Haswell: Conejos Co, Terrace Reservoir spillway 26 July 2019 Asteraceae Indian blanketflower, Indian basket
Gaillardia X grandiflora YES Rich Haswell: Saguache Co, south town limits of Villa Grove by Hwy 285, 24 Aug 2017 Asteraceae blanket flower
Galium boreale [Galium septentrionale] YES Rich Haswell: Mineral Co, Hope Creek burn, 18 June 2018 Rubiaceae northern bedstraw
Galium trifidum [Galium brandegeei] [Galium tinctorum var. subbiflorum] YES Mary M. McDonald: Conejos Co, De Herrera Lake 15 Aug 2022 Rubiaceae threepetal bedstraw
Galium triflorum [Galium flaviflorum] YES Rich Haswell: Rio Grande Co, Beaver Creek W of South Fork, seep, 12 July 2017 Rubiaceae cudweed, fragrant bedstraw
Gayophytum diffusum YES Mary E. McDonald Conejos Co, off FSR 101, 2 miles NW of Hick Canyon 14 June 2016; 28 Aug 2018 Onagraceae spreading groundsmoke
Genista lydia Yes Richard Haswell: Saguache Co, top of Poncha pass by Hwy 285, 8 June 2023 Fabaceae Lydian broom, dwarf broom, common woadwaxen
Gentianella acuta [Gentiana acuta] [Gentianella amarella subsp. acuta] [Gentianella strictiflora] YES Rich Haswell: Hinsdale Co, Big North Clear Creek Falls 8 Aug 2015 [var. heterosepala] Gentianaceae little gentian
Gentianella heterosepala [Gentianella amerela subsp. heterosepala] [Amarella heterosepala] [Gentiana heterosepala] [Gentianella amarella subsp. heterosepala] YES Rich Haswell Rio Grande Co, near Grayback pass 23 Aug 2019 Gentianaceae Autumn dwarf gentian
Gentianodes algida [Gentiana algida][Dasystephana romanzovii] [Gentiana algida] YES Rich Haswell: Rio Grande Co, Grayback Mt 20 Aug 2020 Gentianaceae Arctic gentian
Gentianopsis barbellata [Gentiana barbellatus[ [Anthopogon barbellatus] YES Rich Haswell: Rio Grande Co, Crater Lake trail near Elwood Pass 5 Sept 2016 Gentianaceae perennial fringed gentian
Gentianopsis thermalis [Gentiana thermalis] [Gentiana detonsa] [Gentiana elegans] [Anthopogon elegans] [Gentianopsis detonsa] YES Rich Haswell: Rio Grande Co, south of Grayback pass 5 Aug 2021 Gentianaceae Rocky Mountain fringed gentian
Geranium caespitosum [Geranium atropurpureum] [Geranium eremophilum] [Geranium fremontii] YES Rich Haswell: Conejos Co, Terrace Reservoir 26 July 2019 Geraniaceae purple cluster geranium, pineywoods geranium
Geranium richardsonii YES Rich Haswell: Mineral Co, CO Spring Gulch off Pool Table road 30 July 2015 Geraniaceae Richardson’s geranium
Geranium viscosissimum [Geranium nervosum] [Geranium strigosum] YES Mary E. McDonald: Conejos Co, FSR 118(2) near the upper Rio de los Pinos 7/30/2015 Geraniaceae sticky geranium
Geum aleppicum [Geum decurrens] [Geum strictum var. decurrens] YES Mary E. McDonald: Conejos Co, Lake Fork trail 11 July 2017 Rosaceae yellow avens
Geum macrophyllum YES Rich Haswell: Rio Grande Co, Middle San Francisco Creek 2 July 2021 Rosaceae largeleaf avens
Geum rivale YES Mary E. McDonald: Conejos Co, 30 July 2021, south side of Conejos River from FS Mogote campground on Hwy 17 Rosaceae purple avens
Geum rossii var. turbinatum [Acomastylis rossii] [Geum turbinatum] [Sieversia turbinata] YES Rich Haswell: Rio Grande Co, Grayback pass 5 Aug 2021 Rosaceae alpine avens, Ross’s avens
Geum triflorum YES Rich Haswell: Saguache Co, east of Carnero pass 1 July 2019 Rosaceae prairie smoke
Gleditsia triacanthos YES Rich Haswell: Rio Grande Co, CO Del Norte street side 23 June 2015 Fabaceae honey locust
Glycyrrhiza lepidota [Glycyrrhiza glutinosa] [Liquivita lepidota] YES Rich Haswell: Rio Grande Co, Monte Vista Wildlife Refuge 7 July 2016; Del Norte street side 4 Dec 2023 (seedpods) Fabaceae wild liquorice
Gnaphalium exilifolium [Gnaphalium angustifolium] [Gnaphalium grayi] [Gnaphalium strictum] YES Rich Haswell: Saguache Co, Luders Creek below Luders Creek cpgd, 16 Sept 2015 Asteraceae slender cudweed
Gnaphalium palustre YES Rich Haswell: Alamosa Co, Blanca Wetlands 15 July 2017 Asteraceae western marsh cudweed
Gnaphalium uliginosum YES Rich Haswell: Mineral Co, Beaver Creek Reservoir, drying edge 2 Sept 2020 Asteraceae marsh cudweed
Goodyera oblongifolia [Goodyera decipiens] [Peramium menziesii] YES Rich Haswell: Rio Grande Co, Crystal Lakes S of Del Norte (only leaves) 22 Sept 2018 Orchidaceae western rattlesnake plantain, giant rattlesnake plantain
Grindelia decumbens [Grindelia hirsutula] [Grindelia subincisa] YES Rich Haswell: Rio Grande Co, Del Norte street side 17 Sept 2019 Asteraceae reclined gumweed
Grindelia fastigiata YES Mary E. McDonald: Conejos Co, between CR D5 and FSR 103(1)C, 17 Sept 2017; 20 Aug 2021 Asteraceae pointed gumweed
Grindelia hirsutula [Grindelia acutifolia] [Grindelia revoluta] etc. YES Mary E. McDonald: Conejos Co, near Fox Creek 15 June 2016, 17 Sept 2022 Asteraceae hairy gumweed
Grindelia nuda var. aphanactis [Grindelia aphanactis] [Grindelia squarrosa var. aphanactis] YES Rich Haswell: Saguache Co, rhyolite seep by Hwy 114 12.7 miles W of Saguach 17 July 2016 Asteraceae curlycup gumweed
Grindelia squarrosa [Donia squarrosa] [Grindelia aphanactis] [Grindelia nuda] etc. YES Rich Haswell: Saguace Co, Villa Grove, side of Hwy 285, 13 Aug 2013; Del Norte, Rio Grande Co, by defunct railroad tracks 28 Aug 2016 Asteraceae curly-top gumweed
Grindelia subalpina [Grindelia erecta] YES Rich Haswell: Mineral Co, Shaw Lake, sloping meadow beside lake 6 July 2015 Asteraceae subalpine gumweed
Gutierrezia sarothrae [Xanthocephalum sarothrae] Yes: Rich Haswell: Alamoss Co, Great Sand Dunes NP 18 Aug 2013; Rio Grande Co, Lookout Mt by Del Norte 31 Aug 2020 Asteraceae broom snakeweed, snakebroom, escoba de la vibora
Gypsophila elegans YES Rich Haswell: Rio Grande, Del Norte house garden 27 Sept 2017—26 Sept 2020 Caryophyllaceae baby’s breath
Gypsophila scorzonerifolia YES Rich Haswell: Rio Grande Co, Del Norte street embankment 11 Sept 2016 Yes Caryophyllaceae garden baby’s breath
Hackelia floribunda YES Rich Haswell: Saguache Co, 6 miles E Cochetopa Pass 10 July 2015 Boraginaceae large-flowered stickseed
Halerpestes cymbalaria [Cyrtorhyncha cymbalaria] [Ranunculus cymbalaria] YES Rich Haswell: Rio Grande Co, Middle San Francisco Creek trailhead, bank of creek 2 July 2021 Ranunculaceae alkali buttercup, marsh buttercup
Halogeton glomeratus [Anabasis glomerata] YES Rich Haswell: Alamosa Co, Blanca Wetlands 15 July 2017 Amaranthaceae wienerleaf
Hedysarum occidentale YES Rich Haswell: Saguache Co, Moon Pass, open space in forested slope, 14 July 2021 Fabaceae western sweetvetch, western chainpod
Helianthella parryi YES Rich Haswell: Saguache Co, Pool Table Road 2 air miles NE of Wagon Wheel Gap 1 Aug 2014; Rio Grande Co, Bear Cr trailhead 13 air miles SW of Del Norte 23 Aug 2019 Asteraceae Parry’s little sunflower
Helianthella quinquenervis [Helianthella majuscula] [Helianthus quinquenervis]] YES Rich Haswell: Mineral Co, meadow above Shaw Lake 22 June 2016 Asteraceae little sunflower
Helianthella uniflora [Helianthus uniflorus] YES Mary E. McDonald: La Manga Creek valley, Conejos Co, around 10,230' elev, dry grassland, 7/12/2014; 8/19/2017; 8/26/2021. Asteraceae common little sunflower
Helianthus annuus [Helianthus aridus] YES Rich Haswell: Rio Grande Co, South Fork vacant lot 28 July 2013; Del Norte private yard 17 Sept 2020 Asteraceae common sunflower
Helianthus nuttallii [Helianthus fascicularis] [Helianthus laetiflorus] etc. YES Rich Haswell: Saguache Co, 12.7 miles W of Saguache by Hwy 114, 2 Sept 2019 Asteraceae Nuttall’s sunflower
Helianthus petiolaris [Helianthus petiolaris subsp. fallax] YES Rich Haswell: Rio Grande Co, Limekiln Peak 5.6 air miles SW of Del Norte 25 Aug 2019 Asteraceae prairie sunflower
Heliomeris multiflora [Viguiera multiflora] YES Rich Haswell: Saguache Co, Old Woman Creek 8.6 air miles NW of Del Norte 28 Aug 2014 Asteraceae showy goldeneye
Heliotropium curassavicum [Heliotropium spatulatum] [Heliotropium xerophilum] YES Rich Haswell: Alamosa Co, Blanca Wetlands 31 July 2018 Boraginaceae salt heliotrope
Heracleum maximum [Heracleum maximum ssp. sphondylium] [Heracleum sphondylium] [Heracleum lanatum] YES Rich Haswell: Mineral Co, Big Meadows Reservoir 14 May 2018 Apiaceae cow parsnip
Hesperidanthus linearifolius [Schoenocrambe linearifolia] [Sisymbrium linearifolius] etc. YES Rich Haswell: Conejos Co, San Luis Hills 28 July 2021 Brassicaceae purple skeleton mustard
Heterotheca hirsutissima [Heterotheca villosa var. nana] [Heterotheca villosa var. minor] [Heterotheca villosa var. minor?] [Chrysopsis horrida] [Heterotheca horrida] [Chrysopsis hirsutissima] etc. YES Rich Haswell: Rio Grande Co, quarry trailhead 4 miles E of Del Norte 31 July 2020 Asteraceae false goldenaster
Heterotheca paniculata [Heterotheca fulcrata var. fulcrata] [Heterotheca villosa] [Chrysopsis floribunda] [Heterotheca floribunda] [Heterotheca grandiflora] YES Marisa Szubryt Mineral Co, near Wagon Wheel Gap, 2 Sept 2023 Asteraceae false goldenaster
Heterotheca pedunculata [Chrysopsis bakeri] [Heterotheca villosa var. pedunculata] Yes Rich Haswell: Mineral Co, Shaw Lake 12 air mile ESE of South Fork 31 Aug 2017; 1 Sept 2022 Asteraceae false goldenaster
Heterotheca pumila [Chrysopsis pumila] [Chrysopsis cooperi] [Chrysopsis alpicola] YES Rich Haswell: Saguache Co, just E of old Cochetopa pass 18 Aug 2022 Asteraceae alpine false goldenaster
Heuchera parvifolia [Heuchera flavascens] YES Rich Haswell: Rio Grande Co, Lookout Mt near Del Norte 9 June 2014; Church Creek SW of South Fork, 20 June 2021 Saxifragaceae littleleaf alumroot
Hieracium triste [Hieracium gracile] YES Rich Haswell: Mineral Co, Continental Divide 0.7 miles north of Wolf Creek Pass 28 July 2016 Asteraceae woolly hawkweed
Hippuris vulgaris YES Rich Haswell: in pond off CR14 6 miles SW of Del Norte 17 June 2020 Plantaginaceae common mare’s-tail
Holodiscus dumosus [Holodiscus discolor var. dumosus] [Sericotheca dumosa] [Spiraea dumosa] YES Rich Haswell: Rio Grande Co, Middle San Francisco Creek trailhead 16 July 2021 Rosaceae bush ocean spray, mountain spray, rock-spiraea
Humulus lupulus [Humulus neomexicanus] [Humulus americanus] YES Rich Haswell: Conejos Co, below Terrace Reservoir (male plant) 26 July 2019 Cannabaceae hops, common hop
Hydrophyllum fendleri [Hydrophyllum occidentale var. fendleri] YES Rich Haswell: Rio Grande Co, Middle San Francisco Creek trailhead 18 June 2018 Hydrophyllaceae Fendler’s waterleaf
Hymenopappus filifolius YES Rich Haswell: Rio Grande Co, Bear Creek road N of South Fork 7 June 2021 Asteraceae Columbia cutleaf, fineleaf hymenopappus
Hymenopappus newberryi [Leucampyx newberryi] YES Rich Haswell: Saguache Co, FR 875 (to Moon Pass) 1 mile W of Poso cpgd, beside road 14 July 2021 Asteraceae Newberry’s hymenopappus
Hymenoxys brandegeei [Rydbergia brandegeei] [Tetraneuris brandegeei] YES Loraine Yeatts Conejos Co, flank of Conejos Peak 7 Aug 2008 Asteraceae Brandegee’s rubberweed
Hymenoxys grandiflora [Rydbergia grandiflora] [Tetraneuris grandilora] YES Rich Haswell: Rio Grande Co, saddle between Poison and Bennett Pks 19 June 2017 Asteraceae old-man-of-the-mountain
Hymenoxys hoopesii [Dugaldia hoopesii] YES Rich Haswell: Mineral Co, Tucker Ponds, SW of South Fork 23 July 2019 Asteraceae orange sneezeweed
Hymenoxys richardsonii [Picradenia richardsonii] YES Rich Haswell: Saguache Co, seep beside Hwy 114, 12.7 miles W of Saguache 30 June 2020 Asteraceae pingue rubberweed
Hyoscyamus niger YES Rich Haswell: Mineral Co, Embargo Creek road junction with Groundhog road, N of South Fork 26 July 2016 Solanaceae black henbane, stinking nightshade
Hypericum scouleri [Hypericum formosum var. scouleri] YES Rich Haswell: Rio Grande Co, meadow above Beaver Creek Reservoir, 2 Sept 2020 Hypericaceae western St. John’s wort
Ipomopsis aggregata YES Rich Haswell: Saguache Co, CO Penitente Canyon 21 Aug 2014 Polemoniaceae scarlet gilia
Ipomopsis laxiflora [Gilia laxiflora] [Gilia macombii var. laxiflora] YES Patrick Alexander: Saguache Co, 6 km east of Saguache, 5 June 2021 Polemoniaceae iron ipomopsis
Ipomopsis longiflora [Gilia longiflora] [Cantua longiflora] YES Rich Haswell: Alamosa Co, Blanca Wetlands 30 Aug 2017 Polemoniaceae flaxflowered gilia, long-flower ipomopsis
Iris missouriensis [Iris arizonica] YES Rich Haswell: Hinsdale Co, North Clear Creek Falls 22 June 2017 Iridaceae western iris
Iva axillaris YES Rich Haswell: Saguache Co, Russell Lakes SWA 24 Sept 2019 Asteraceae povertyweed, death weed, sumpweed
Jamesia americana [Edwinia americana] YES Rich Haswell: Saguache Co, Penitente Canyon 22 June 2014 Hydrangeaceae fivepetal cliffbush, waxflower
Juniperus communis YES Rich Haswell: Rio Grande Co, Middle San Francisco Creek trail 9 air miles S of Del Norte 17 June 2015 Cupressaceae common juniper
Juniperus monosperma [Juniperus gymnocarpa] [Juniperus mexicana var. monosperma] [Juniperus occidentalis var. monosperms] [Sabina monosperma] YES Russell Clark: Costilla Co, 4 km southeast of Fort Garland 25 May 2022 Cupressaceae one-seed juniper
Juniperus scopulorum [Sabina scopulorum] YES Rich Haswell: Rio Grande Co, Chico trail 0.25 miles S of Del Norte 3 March 2020 Cupressaceae Rocky Mountain juniper
Krascheninnikovia lanata [Krascheninnikovia ceratoides subsp. lanata] [Ceratoides lanata] YES Rich Haswell, Rio Grande Co, within town limits of Del Norte, 18 May 2020 Amaranthaceae winterfat
Lactuca oblongifolia [Mulgedium pulchellum] [Lactuca tatarica var. pulchella] [Lactuca pulchellum] [Sonchus pulchellus] YES Rich Haswell: Alamosa Co, Alamosa Wildlife Preserve 11 Aug 2016; Rio Grande Co, San Francisco Creek trailhead 16 July 2021 Asteraceae blue lettuce
Lactuca serriola [Lactuca scariola] YES Rich Haswell: Saguache Co, Russell Lakes SWA 8 Sept. 2017; Rio Grande Co, San Francisco Creek trailhead 16 July 2021 Asteraceae prickly lettuce
Ladeania lanceolata [Psoralidium lanceolatum] YES Rich Haswell: Alamosa Co, Great Sand Dunes 18 July 2020 (fruiting) Fabaceae lemon scurfpea, wild lemonweed
Lappula redowskii [Lappula redowskii var. cupulata] [Lappula redowski var. occidentalis] [Lappula occidentalis var. occidentalis] YES Rich Haswell: Rio Grande Co, Del Norte, business lot 2 May 2021 Boraginaceae flatspine stickseed, stickweed, flatspine sheepbur, western stickseed
Lathyrus eucosmus YES Rich Haswell: Rio Grande Co, Del Norte House 10 June 2015 Fabaceae bush vetchling
Lathyrus lanszwertii var. leucanthus [Lathyrus leucanthus] YES Rich Haswell: Rio Grande Co, hunters camp 15 air miles SW of Del Norte 13 June 2013 Fabaceae Nevada sweetpea, peavine
Lathyrus latifolius YES Rich Haswell: Rio Grande Co, Del Norte street side 28 Aug 2016 [cultivated plant] Fabaceae everlasting pea, perennial peavine
Lemna minor YES Rich Haswell: Rio Grande Co, Del Norte, Rio Grande slough north of the river, 19 July2015. Araceae common duckweed
Lemna minuta [Lemna minima] YES Rich Haswell: Alamosa Co, Blanca Wetlands 13 Sept 2018; Saguache Co, pond above Luders Campground, 30 June 2020 Araceae least duckweed
Lemna turionifera YES Mary E. McDonald, Conejos Co, near Rio de los Pinos 31 Aug and 3 Sept 2022 Araceae turion duckweed
Lepidium alyssoides [Lepidium montanum var. alyssoides] YES Rich Haswell: Mineral Co, trailhead to Farmers trail 2.5 air miles SE of Creede 2 Aug 2021 Brassicaceae mesa pepperweed, mesa pepperwort
Lepidium appelianum [Cardaria pubescens] YES: kelccole: Conejos Co, near Morgan, southwest of Alamosa 21 July 2023 Brassicaceae hairy whitetop
Lepidium chalepense [Lepidium chalepensis] [Cardaria chalepensis] [Lepidium draba subsp. chalepensis] YES Rich Haswell: Rio Grande Co, by irrigation canal 11 July 2015 Brassicaceae lenspod whitetop
Lepidium densiflorum [Lepidium apetalum] [Lepidium ramosum] [Lepidium elongatum] etc. YES Rich Haswell: Alamosa Co, Great Sand Dunes NP, Pinyon Flats cpgd 26 Juine 2016; Rio Grande Co, Del Norte flower garden 29 June 2022 Brassicaceae prairie pepperweed, common pepperweed
Lepidium draba [Cardaria draba] YES Rich Haswell: Alamosa Co, Rio Grande Nature Preserve near Alamosa 7 July 2016 Brassicaceae short whitetop, hoary cress, Thanet cress
Lepidium latifolium [Cardaria latifolia] YES Rich Haswell: Conejos Co, under Hwy 240 bridge over the Rio Grande 28 July 2021 Brassicaceae tall whitetop, iron weed, broad-leaved whitetop
Lepidium montanum [Lepidium jonesii] YES Rich Haswell: Mineral Co, Farmers trail SW of Creede 26 May 2021; Rio Grande Co, Middle San Francisco Creek trailhead 16 July 2021 Brassicaceae mountain pepperweed
Lepidium ramosissimum [Lepidium bourgeauanum] [Lepidium densiflorum var. macrocarpum] YES Rich Haswell: Rio Grande Co, Del Norte street side 15 June 2018 Brassicaceae many-branched pepperweed
Leptosiphon nuttallii [Linanthastrum nuttallii] [Gilia nuttallii] [Linanthus nuttallii] YES Rich Haswell: Mineral Co, Continental Divide north of Wolf Creek Pass 6 Aug 2014 Polemoniaceae Nuttall’s linanthus, Nuttall's desert-trumpet
Leucanthemum vulgare YES Rich Haswell: Mineral Co, Shaw Lake 23 Aug 2013; 3 Sept 2022 Asteraceae field daisy, oxeye daisy
Leucosyris parviflora [Arida parviflora] [Machaeranthera parviflora] [Aster parvulus] etc. YES Rich Haswell: Alamosa Co, Mosca cpgd 23 Aug 2014 Asteraceae small desert tansy
Lewisia pygmaea [Oreobroma pygmaea] [Talinum pygmaeum] YES Rich Haswell: Mineral Co, CO Big Meadows Reservoir north side 28 May 2016 Montiaceae alpine lewisia, pygmy bitterroot
Ligusticum filicinum YES Mary E. McDonald: Conejos Co, Continental Divide trail at Cumbres Pass 9 July 2021 Apiaceae fernleaf licorice-root
Ligusticum porteri YES Rich Haswell: Rio Grande Co, Middle San Francisco Creek 18 June 2018 Apiaceae lovage, oshá, bear root, bear medicine
Limosella aquatica YES Rich Haswell: Rio Grande Co, pond in old gravel pit NE of Del Norte, 28 Aug 2020; by and in pond of unused gravel pit NW of Del Norte 18 Sept 2022; Conejos Co, below beaver dam, Conejos River 7 Sept 2021 Scrophulariaceae water mudwort
Linanthus pungens [Leptodactylon pungens] [Leptodactylon brevifolium] [Cantua oungens] [Gilia pungens] YES Rich Haswell: Rio Grande Co, Bear Creek NE of South Fork 7 June 2021 Polemoniaceae prickly-phlox, granite gilia
Linaria dalmatica [Antirrhinum dalmaticum] YES Mary E. McDonald: Conejos Co, along FSR 129(1)C, 17 Aug 2019 Plantaginaceae Dalmatian toadflax
Linaria vulgaris YES Rich Haswell: Mineral Co, Willow Creek above Creede, along old mining road 2 Aug 2021 Plantaginaceae toadflax, butter-and-eggs
Linnaea borealis [Linnaea borealis var. americana] [Linnaea americana] [Linnaea americana var. borealis] YES Rich Haswell: Rio Grande Co, logging road N of Bear Creek trail 19 miles SW of Del Norte 15 July 2014 Yes Caprifoliaceae twin-flower
Linum australe [Linum aristatum var. australe] [Carthartolinum australe] [Mesynium aristatum] YES Rich Haswell: On Carnero Pass road 7 miles W of Penitente Canyon turnoff 3 July 2019; Deep Creek trail SE of Creed 11 Aug 2020; near Hick's canyon Conejos Co 23 June 2021 below Terrace Reservoir in meadow Yes Linaceae yellow flax
Linum lewisii [Adenolinum lewisii] [Linum perenne var. lewisii] YES Rich Haswell: Hinsdale Co, North Clear Creek Falls 22 June 2017 Yes Linaceae blue flax
Linum perenne YES Richard Haswell: Rio Grande Co, Bear Creek 1.5 air miles NE of South Fork 8 June 2021 Linaceae perennial flax
Lithophragma tenellum [Lithophragma australe] [Lithophragma tenella] YES Mary E. McDonald: Conejos Co, dry open meadow by Forest Service Road 101, 8,6500' elev. 19 June2019 Saxifragaceae slender woodland star
Lithospermum incisum [Lithospermum angustifolium] [Lithospermum linearifolium] [Lithospermum oblongum] YES Rich Haswell: Saguache Co, Penitente Canyon 26 May 2018 Boraginaceae fringed puccoon, fringed stoneseed
Lithospermum multiflorum [Lithospermum cognatum] YES Rich Haswell: Rio Grande Co, West Fork of Pinos Creek 15 July 2014 Boraginaceae manyflowered puccoon
Lobularia maritima YES Rich Haswell: Rio Grande Co, Del Norte yard, 22 Aug 2020 Brassaciceae sweet alyssum
Lomatogonium rotatum YES Rich Haswell: Saguache Co, vicinity of North Pass 23 Aug 2015; vicinity of Carnero Pass 23 Aug 2015 Gentianaceae marsh felwort
Lonicera involucrata [Distegia involucrata] [Xylosteon involucratum] YES Rich Haswell: Mineral Co, Big Meadows Reservoir 26 Aug 2019 Caprifoliaceae twinberry, black honeysuckle
Lonicera tatarica YES Rich Haswell: Rio Grande Co, Del Norte yard 900 block S Columbia 28 July 2018 Caprifoliaceae Tartarian honeysuckle
Lupinus argenteus [Lupinus argenteus var. argenteus] YES Rich Haswell: Saguache Co, just E of Moon pass 14 July 2021 Fabaceae silvery lupine
Lupinus caespitosus YES Carol English: Saguache Co, Crestone street side 21 sept 2020 Yes Fabaceae stemless dwarf lupine
Lupinus caudatus [Lupinus argenteus var. argophyllus] [Lupinus caudatus subsp. argophyllus] [Lupinus aduncus] [Lupinus helleri] YES Rich Haswell: Costilla Co, 3 miles E of Fort Garland 11 June 2015 Fabaceae tallcup lupine, Kellogg's lupine
Lupinus kingii [Lupinus argillaceus] [Lupinus sileri] YES Rich Haswell: Conejos Co, CR 250 above Terrace Reservoir 26 July 2019 Fabaceae King’s lupine
Lupinus parviflorus [Lupinus argenteus var. parviflorus] YES Rich Haswell: Rio Grande Co, Middle San Francisco Creek trailhead 2 July 2021 Fabaceae lodgepole lupine
Lupinus prunophilus [Lupinus polyphyllus var. prunophilus] YES Rich Haswell: Rio Grande Co, San Francisco Creek in aspen grove 2 July 2021 Fabaceae hairy bigleaf lupine
Lupinus pusillus [Pusillus rubens] YES Rich Haswell: Alamosa Co, Great Sand Dunes NPM 22 June 2019 Fabaceae dwarf lupine, rusty lupine
Lupinus sericeus [Lupinus amplus] [Lupinus bakeri] YES Rich Haswell: Saguache Co, Buffalo Pass campground 23 Aug 2016 Fabaceae silky lupine
Lycium barbarum [Lycium halimifolium] [Lycium vulgare] YES Rich Haswell: Rio Grande Co, Del Norte street sides; 11 July 2014; 1 June 2022 Solanaceae wolfberry, matrimony-vine
Lycopus asper [Lycopus lucidus] YES Rich Haswell: Saguache Co, Russell Lakes SWA 20 Sept 2020 Lamiaceae rough bugleweed
Lygodesmia juncea [Prenanthes juncea] YES Rich Haswell: Alamosa Co, By Hwy 150, 0.9 miles SW of entrance to the Great Sand Dunes NP, 20 July 2021 Asteraceae rush skeletonweed
Lysimachia ciliata Yes Alec McKeand: Conejos Co, Conejos River north of Sego Springs SWA 25 Aug 2023 Primulaceae fringed loosestrife
Lysimachia maritima [Glaux maritima] [Glaucoides maritima] YES Rich Haswell: Saguache Co, along road marking the north edge Russell Lakes Wildlife Preserve 11 July 2016 Yes Myrsinaceae sea milkwort, black saltwort
Machaeranthera tanacetifolia [Aster tanacetifolius] [Dieteria coronopifolia] [Machaeranthera coronopifolia] YES Rich Haswell: Rio Grande Co, along wash crossing hwy to Sand Dunes 1.1 miles SW of entrance 20 July 2021 Asteraceae Tahoka daisy, tansyleaf tansyaster
Madia glomerata YES Mary E. McDonald: Conejos Co, along Hwy 17, east edge of Los Mogotes 7 Sept 2016, 31 July 2018 Asteraceae mountain tarweed
Maianthemum racemosum YES Rich Haswell: Rio Grande Co, West Fork of Pinos Creek at Bear Creek trail 4 June 2018 Asparagaceae false Solomon’s seal
Maianthemum stellatum [Convallaria stellata] [Smilacina stellata] [Vagnera stellata] YES Rich Haswell: Mineral Co, Shaw Lake, July 5 2018 Asparagaceae starry false Solomon’s seal
Malus domestica [Malus pumila] [Malus communis] [Malus sylvestris] [Pyrus malus] YES Rich Haswell: Rio Grande Co, Del Norte yard, 2014-2023 Rosaceae common apple, apple tree
Malva neglecta [Malva rotundifolia] YES Mary E. McDonald, Conejos Co, Elk Creek campground, 6 July 2016; Rich Haswell, Del Norte street side 20 July 2020l Malvaceae cheeseweed, buttonweed, cheeseplant
Marrubium vulgare YES Mary E. McDonald: Conejos Co, on Hwy 17, 1 mile E of Fox Creek community 17-20 Sept 2017 Lamiaceae common horehound, white horehound
Matricaria discoidea [Matricaria matricarioides] YES Rich Haswell, Saguache Co, FR740 one mile S of HWY 14, 26 Aug 2021; Mary E. McDonald: Conejos Co, 2 Oct 2018 Asteraceae pineapple weed
Medicago lupulina YES Rich Haswell: Conejos Co, bank of the Rio Grande by Hwy 142 28 July 2021 Fabaceae black medick, hop-trefoil, hop-medick
Medicago sativa [Medicago falcata] YES Rich Haswell: streetside, Del Norte 1 May 2021; albino form Del Norte, street side 22 June 2018 Fabaceae alfalfa, lucerne
Melilotus albus [Melilotus officinale subsp. albus] YES Rich Haswell: Rio Grande Co, Embargo Road at Embargo Creek 26 July 2016 Fabaceae white sweetclover
Melilotus officinalis [Trifolium melilotus-officinalis] YES Rich Haswell: Alamosa Co, Blanca Wetlands N of Alamosa 18 Sept 2020; Nick Moore: Saguache Co, Russell Lakes WPA 17 July 2022 (iNaturalist observation 127148431) Fabaceae yellow sweetclover
Mentha arvensis [Mentha canadensis] YES Rich Haswell: Alamosa Co, Great Sand Dunes NP 16 July 2018 Lamiaceae field mint, wild mint, corn mint
Mentzelia albicaulis [Acrolasia albicaulis] [Acrolasia parviflora] Mentzelia parviflora] [Mentzelia mojavensis] YES Rich Haswell: Rio Grande Co, near Del Norte 12 May 2021 Loasaceae white-stemmed blazingstar
Mentzelia multiflora [Mentzelia lutea] [Mentzelia pumila] [Nuttallia multiflora] YES Rich Haswell: Rio Grande Co, Lookout Mt near Del Norte 16 Aug 2021 Loasaceae Adonis blazingstar
Mentzelia rusbyi [Nuttallia rusbyi] YES Rich Haswell: Rio Grande Co, Lookout Mt just SW of Del Norte 12 Oct 2018 Loasaceae Rusby’s blazingstar
Mentzelia speciosa [Mentzelia sinuata] [Mentzelia aurea] [Nuttallia sinuata] YES Rich Haswell: Mineral Co, CO Farmers Trail trailhead S of Creede 2 Aug 2021 Loasaceae jeweled blazingstar
Menyanthes trifoliata YES Mary E. McDonald: Conejos Co, pond at Cumbres pass 16 July 2022 Menyanthaceae buckbean, marsh trefoil, bogbean
Mertensia bakeri [Mertensia amoena] [Mertensia lanceolata var. nivalis] Yes: Patrick Alexander: Conejos Co, South Elk Creek, 1 July 2018 Boraginaceae Baker's bluebells
Mertensia ciliata [Pulmonaria ciliata] YES Rich Haswell: Rio Grande Co, 3 miles S of Grayback Mt 29 June 2017 Boraginaceae tall fringed bluebell, mountain bluebell
Mertensia franciscana [Mertensia alba] [Mertensia grandis] YES Rich Haswell: Rio Grande Co, jeep trail above Poso cpgd 3 July 2019 Boraginaceae Franciscan bluebell
Mertensia fusiformis [Mertensia oblongifolia] [Mertensia ovata var. ovata] YES Rich Haswell: Saguache Co, Penitente Canyon 26 May 2018 Boraginaceae spindle-rooted bluebells
Mertensia lanceolata [Mertensia oblongifolia] [Mertensia fusiformis] [Mertensia viridis] YES Rich Haswell: Rio Grande Co, road to Middle San Francisco Creek trailhead, north of Del Norte, 6 June 2014; Rock Creek cpgd, 4 July 2016 Boraginaceae lanceleaf bluebells
Mertensia viridis [Mertensia bakeri] [Mertensia fusiformis] [Mertensia lanceolata var. nivalis] [Mertensia oblongifolia] YES Rich Haswell: Mineral Co, base of Alberta Peak S of Wolf Creek pass 28 July 2016 Boraginaceae Baker's bluebell
Micranthes odontoloma [Micranthes arguta] [Saxifraga odontoloma] [Saxifraga arguta] [Saxifraga punctata] YES Rich Haswell: Mineral Co, above Tucker Ponds, 23 July 2029 Saxifragaceae brook saxifrage
Micranthes oregana [Saxifraga oregona] YES Rich Haswell: Rio Grande Co, southwest slope of Bennett Mt 22 July 2014 Saxifragaceae bog saxifrage
Micranthes rhomboidea [Saxifraga rhomboidea] YES Rich Haswell: Rio Grande Co, Grayback pass 23 Aug 2019 Saxifragaceae snowball saxifrage
Mirabilis linearis [Oxybaphus linearis] [Mirabilis hirsuta] YES Rich Haswell: Rio Grande Co, one mile N of Del Norte 21 Aug 2020 Nyctaginaceae narrowleaf four-o’clock
Mirabilis multiflora [Oxybaphus multiflorus] YES Rich Haswell: Saguache Co, road to La Garita N of Del Norte 14 July 2021 Nyctaginaceae Colorado four-o’clock
Mirabilis oxybaphoides [Allionia oxybaphoides] [Oxybaphus wrightii] YES Rich Haswell: Mineral Co, base of volcanic dyke, NW of Del Norte 17 June 2017 Nyctaginaceae smooth spreading four-o’clock
Moehringia lateriflora [Arenaria lateriflora] YES Rich Haswell: Rio Grande Co, San Francisco Cr trailhead, by water 21 July 016 Yes Caryophyllaceae bluntleaf sandwort
Monarda fistulosa [Monarda mollis] [Monarda comata] [Monarda menthifolia] [Monarda stricta] Yes pandasniper: Conejos Co south of La Jara Reservoir Sept 2021 Lamiaceae wild bergamot, beebalm
Monarda pectinata [Monarda citriodora var. pectinata] YES Rich Haswell: Alamosa Co, Great Sand Dunes NP 31 July 2018 Lamiaceae plains beebalm
Moneses uniflora [Pyrola uniflora] YES Rich Haswell: Rio Grande Co, Bear Creek S of Del Norte 17 July 2016 Ericaceae woodnymph, single delight
Montia chamissoi [Claytonia chamissoi] [Crunocallis chamissoi] YES Rich Haswell: Mineral Co, Cathedral cpgd, Embargo Cr 23 July 2016 Montiaceae water miner’s-lettuce
Myosurus minimus [Ranunculus myosurus] [Ranunculus minimus] YES Mary E. McDonald Conejos Co, FSR 101, 7 miles above Hicks Canyon 28 May 2021 Ranunculaceae tiny mousetail
Myriophyllum sibiricum [Myriophyllum exalbescens] [Myriophyllum spicatum subsp. exalbescens] YES Rich Haswell: Conejos Co, The Rio Grande, in running water by the west bank where Hwy 128 crosses 28 July 2021; Alamosa Co, Blanca Wetlands Wildlife Preserve, edge of pond 13 Sept 2018 Haloragaceae shortspike water-milfoil
Nama dichotoma [Nama dichotomum] [Conanthus angustifolius] [Hydrolea dichotoma] [Marilaunidium hispidum] YES Katherine Zybko: Saguache Co, the Great Sand Dunes NP, 24 and 30 July 2021. Namaceae [Hydrophyllaceae] wishbone fiddleleaf
Nasturtium microphyllum [Rorippa microphylla] [Nasturtium uniseriatum] YES Rich Haswell: Saguache Co, seep below Hwy 114, 12.7 air miles W of Saguache 2 Sept 2019 Brassicaceae small-leafed water cress
Nasturtium officinale [Sisymbrium nasturtium-acquaticum] [Rorippa nasturtium] YES Rich Haswell: Saguache Co, Russell Lakes SWA 30 May 2020 Brassicaceae watercress
Neoparrya lithophila [Aletes lithophilus] YES Rich Haswell, Rio Grande Co, hillside just W of Del Norte town limit, 20 May 2016 Apiaceae Bill’s parsley
Nepeta cataria YES Rich Haswell: Rio Grande Co, Del Norte driveway side 28 May 2019 Lamiaceae catnip
Noccaea fendleri var.glauca [Noccaea montana] [Thlaspi montanum] YES Rich Haswell: Rio Grande Co, Elwood pass 2 Sept 2019 Brassicaceae pennycress, wild candytuft
Nuphar polysepala [Nuphar lutea] [Nymphaea polysepala] YES Mary E. McDonald: Conejos Co, Cumbres Pass, natural pond, 24 July 2016; Rich Haswell Conejos Co, mattress bog pond at Cumbres pass 2 Aug 2022 Nymphaeaceae spatterdock
Oenothera albicaulis [Anogra albicaulis] [Oenothera ctenophylla] YES Rich Haswell: Alamosa Co, by San Luis Lake, 28 July 2017 Onagraceae whitestem evening primrose
Oenothera cespitosa [Oenothera caespitosa] YES Rich Haswell: Saguache Co, Biedell Creek north of La Garita 31 May 2019 Onagraceae tufted evening primrose
Oenothera coronopifolia [Anogra coronopifolia] YES Rich Haswell: Rio Grande Co, Del Norte, street verge, 29 May 2021 Onagraceae cutleaf evening-primrose
Oenothera elata [Oenothera hookeri] YES Rich Haswell: Rio Grande Co, 7 miles W of Center, irrigation ditch 30 June 2018 [var. hookeri] Onagraceae Hooker’s evening primrose
Oenothera flava [Lavauxia flava] [Oenothera taraxacoides] YES Rich Haswell: Rio Grande Co, Beaver Creek Reservoir 7 July 2020 Onagraceae yellow evening primrose, longtubed evening primrose
Oenothera macrocarpa [Megapterium macrocarpum] [Megapterium nuttallianum] YES Scott Smith: Saguache Co, by Hwy 285 north of Villa Grove 14 July 2017 Onagraceae Missouri evening primrose, Ozark sundrops, bigfruit evening primrose, fluttermill
Oenothera pallida [Oenothera trichocalyx] [Oenothera runcinata] [Oenothera albicaulis var. runcinata] etc. YES Rich Haswell: Rio Grande Co, just south of Del Norte, 14-16 July 2023 (subsp. trichocalyx); Lynn Seman: Rio Grande Co, above South Fork on Hwy 149, 14 Aug 2022 Onagraceae pale evening-primrose
Oenothera suffrutescens [Gaura coccinea] [Gaura epiobioides] [Gaura glab ra] etc. YES Rich Haswell: Rio Grande Co, junction of Groundhog and Embargo Creek roads 8 July 2021 Onagraceae scarlet beeblossom
Oenothera villosa [Gaura villosa] YES Rich Haswell: Mineral Co, Junction of Hwy 160 and Big Meadows Reservoir road 5 July 2016 Onagraceae hairy evening-primrose
Onobrychis viciifolia YES Rozemarijn Bradshaw Saguache Co, within town limits of Saguache, 11 June 2021 Fabaceae sainfoin
Opuntia fragilis [Cactus fragilis] [Opuntia brachyarthra] YES Bret Turner: Saguache Co, 4 km southwest of Moffat, 13 June 2020 Cactaceae brittle prickly-pear
Opuntia polyacantha [Opuntia erinacea var. utahensis] [Opuntia trichophora] YES Rich Haswell: Rio Grande Co, Quarry trail E of Del Norte 24 June 2017 Yes Cactaceae prickly pear, starvation cactus
Oreocarya suffruticosa var. jamesii [Oreocarya suffruticosa var. suffruticosa] [Oreocarya cinerea var. jamesii] [Cryptantha jamesii] [Crypantha cinerea] YES Rich Haswell: Conejos Co, San Luis Hills, saddle between the Conejos and Rio Grande rivers beside Hwy 142, in assocation with O. suffruticosa var. pustulosa 28 July 2021 Boraginaceae James’s catseye
Oreocarya suffruticosa var. pustulosa [Oreocarya pustulosa; Oreocarya cinerea] [Cryptantha jamesii var. pustulosa] YES Rich Haswell: Conejos Co, saddle between Conejos River and the Rio Grande River near Hwy 142, San Luis Hills 28 July 2021 Boraginaceae San Juan cryptantha
Oreocarya thyrsiflora [Cryptantha thyrsiflora] [Eritrichium glomeratum] [Oreocarya hispidissima] [Oreocarya urticacea] YES Rich Haswell: Rio Grande Co, quarry trail 4.7 air miles E of Del Norte 24 June 2017 Boraginaceae calcareous cryptantha
Oreocarya virgata [Cryptantha virgata] YES Rich Haswell: Saguache Co, Penitente Canyon 26 June 2015 [previous season's plant] Boraginaceae miner’s candle
Oreocarya weberi YES Rich Haswell: Saguache Co, rhyolite escarpment 5 miles E of CR14 and Hwy114 junction 17 July 2016 Boraginaceae Weber’s oreocarya
Oreochrysum parryi [Haplopappus parryi] [Solidago parryi] YES Rich Haswell: Mineral Co, Continental Divide trail N of Wolf Creek pass 6 Aug 2014 Asteraceae Parry’s goldenrod
Oreoxis bakeri [Cymopterus bakeri] YES LoraIne Yeatts: Conejos Co, flank of Conejos Peak 7 Aug 2008 Apiaceae Baker’s alpine parsley
Orthilia secunda [Pyrola secunda] [Ramischia secunda] [Orthilia obtusada] YES Rich Haswell: Mineral Co, Shaw Lake 31 July 2017 Ericaceae one-sided wintergreen
Orthocarpus luteus YES Rich Haswell: Saguache Co, Taylor Canyon meadow near Luders Creek Cpgd, 26 Aug 2021; Russell Lakes SWA 8 Sept 2017 Orobanchaceae yellow owl clover
Orthocarpus purpureoalbus YES Mary E. McDonald: Conejos Co, 1 Aug 2014; off of Forest Service Road 103(2)B between Los Mogotes and the New Mexico border Orobanchaceae purple owl clover
Osmorhiza depauperata [Osmorhiza obtusa] [Washingtonia obtusa] YES Rich Haswell, Mineral Co, Tucker Ponds 23 July 2019 Apiaceae blunt sweet cicely
Oxybasis glauca [Chenopodium glaucum] YES Rich Haswell, Rio Grande Co, pond 6 miles SW of Del Norte, 17 June 2020 Yes Amaranthaceae oakleaf goosefoot
Oxybasis rubra [Chenopodium rubrum] YES Rich Haswell: Saguache Co, Russell Lakes SWA 3 July 2016 Yes Amaranthaceae red goosefoot
Oxypolis fendleri [Archemora fendleri] YES Rich Haswell: Rio Grande Co, Bear Creek trail 13.3 air miles SW of Del Norte 17 June 2020 Apiaceae cowbane
Oxyria digyna [Rumex digynus] YES Rich Haswell: Rio Grande Co, Grayback pass 20 July 2015 Polygonaceae alpine sorrel
Oxytropis deflexa var. pulcherrima [Oxytropis deflexa var. deflexa] YES Rich Haswell: Saguache Co, North Pass Hwy 114, 22 June 2017 Fabaceae nodding locoweed
Oxytropis deflexa var. sericea [Aragallus pinetorum] [Oxytropis pinetorum] [Oxytropis vegana] YES Mary E. McDonald: Conejos Co, 4 miles NW of junction of FSR 250 and Hwy 17, 18 July 2022 Fabaceae silky nodding locoweed
Oxytropis lambertii [Aragallus articulatus] [Oxytropis bilocularis] YES Rich Haswell: Mineral Co, CO Cottonwood Grove SE of Creede 28 June 2019 Fabaceae purple locoweed
Oxytropis sericea [Oxytropis deflexa var. sericea] YES Rich Haswell: Saguache Co, ± 4 road miles E of Saguache on Hwy 285, along both sides of highway, 3 June 2021 Fabaceae white locoweed, silky crazyweed
Oxytropis splendens [Aragallus splendens] [Oxytropis richardsonii] [Oxytropus splendens] YES Rich Haswell: Saguache Co, Luder's Creek cpgd 17 July 2016 Fabaceae whorled locoweed
Ozomelis stauropetala [Mitella stauropetala] [Mitella stenopetala] YES Rich Haswell: Mineral Co, Big Meadows Reservoir 18 June 2015 Saxifragaceae sideflowered mitrewort
Packera cana [Senecio hallii var. discoidea] [Senecio canus] YES Rich Haswell: Rio Grande Co., Burro Creek trail, Pinos Creek 4 June 2014 Asteraceae woolly groundsel
Packera crocata [Packera dimorphophylla] [Senecio crocatus] YES Rich Haswell: Rio Grande Co, mesic meadow 1.1 air miles WSW of Grayback pass 6 July 2022 Asteraceae saffron ragwort
Packera dimorphophylla [Packera crocata] YES Rich Haswell, Rio Grande Co, near Elwood Pass 9 June 2016; Mineral Co, Shaw Lake July 6 2018 Asteraceae two-leaf groundsel
Packera fendleri [Senecio fendleri] [Senecio canovirens] YES Rich Haswell: Saguache Co, trail to North Crestone Lake 30 Aug 2014; Mineral Co, Farmer's trail trailhead S of Creede 2 Aug 2021 Asteraceae Platte groundsel
Packera multilobata [Senecio multilobatus] [Senecio leucoreus] [Senecio lynceus] etc. YES Rich Haswell, Mineral Co, Big Meadows Reservoir 6 July 2016 Asteraceae lobeleaf groundsel
Packera porteri YES Rich Haswell: Rio Grande Co, Grayback Mt 14 July 2016 Asteraceae Porter’s groundsel
Packera pseudaurea YES Rich Haswell: Mineral Co Shaw Lake 7/8/2020; Rio Grande Co, 0.2 miles S of Grayback pass 8/5/2021 Asteraceae falsegold groundsel
Packera streptanthifolia [Senecio acutidens] [Senecio cymbalarioides] [Packer oödes] YES Mary E. McDonald Conejos Co, below Trujillo Reservoir dam 11 Aug 2017 Asteraceae Rocky Mountain groundsel
Packera thurberi [Packera neomexicana, Packera tridenticulata] [Senecio oblanceolatus] [Senecio remifolius] [Senecio thurberi] [Senecio neomexicanus] YES Rich Haswell: Mineral Co, Willow Creek above Creede 6 June 2017 Asteraceae Thurber’s groundsel, New Mexico groundsel, three-toothed ragwort
Packera werneriifolia [Packera saxosa] [Senecio aureus] [Senecio pentadontus] [Senecio saxosus] YES Rich Haswell: Mineral Co, Hunters Lake, SWW of South Fork, 2 July 2014; Rio Grande Co Burro trail 4 June 2014 Asteraceae alpine groundsel
Papaver orientale YES "bounceoffwalls": Rio Grande Co, end of Castle Rock Creek Road southwest of Del Norte 23 June 2018 Papaveraceae Oriental poppy
Parnassia fimbriata YES Jacob Penner: Cottonwood Creek, Sangre de Cristos, Saguache Co, 15 June 2020 Celastraceae [Parnassiaceae] fringed grass-of-Parnassus
Paronychia pulvinata YES Rich Haswell: Rio Grande Co, Grayback Mt. 8 July 2019 Caryophyllaceae Rocky Mountain nailwort
Paronychia sessiliflora YES Rich Haswell: Rio Grande Co, Lookout Mt. by Del Norte 14 June 2017 Caryophyllaceae low nailwort, creeping nailwort
Parthenocissus quinquefolia [Hedera quinquefolia] [Parthenocissus inserta] [Vitis inserta] YES Rich Haswell: Rio Grande Co, Del Norte, covering side of brick building on main street 4 July 2017 Vitaceae Virginia creeper, Victoria creeper, five-finger ivy
Paxistima myrsinites [Pachystima myrsinites] [Ilex myrsinites] YES Rich Haswell: Rio Grande Co, Bear Creak trail S of Del Norte (in flower) 15 May 2017 Celastraceae Oregon boxleaf, mountain lover
Pectiantia pentandra [Mitella pentandra] YES Rich Haswell: Mineral Co, CO stream feeding Tucker Ponds 23 July 2019 Saxifragaceae five-stamen mitrewort, five-point bishop’s cap, bishop’s mitrewort
Pectis angustifolia YES Janis Haswell: Saguache Co, Old Woman Creek road, 24 Aug 2014 Yes Asteraceae lemonscent
Pedicularis bracteosa [Pedicularis paysoniana] YES Rich Haswell: Saguache Co, Luders Campground 17 July 2016 Scrophulariaceae bracted lousewort
Pedicularis crenulata YES Hannah Floyd: Saguache Co, Russell Lakes, 17 June 2021 Scrophulariaceae meadow lousewort
Pedicularis groenlandica [Oligosporus groenlandicus] [Elephantella groenlandica] YES Rich Haswell: Rio Grande Co, Grayback pass 5 Aug 2021 Scrophulariaceae elephanthead lousewort, elephant’s head
Pedicularis parryi [Pedicularis mogollonica] YES Rich Haswell: Rio Grande Co, 3 m. S of Grayback Mountain 17 July 2020 Scrophulariaceae Parry’s lousewort
Pedicularis procera [Pedicularis grayi] YES Rich Haswell: Rio Grande Co, Middle San Francisco Creek trailhead 18 June 2018 Scrophulariaceae fernleaf lousewort
Pedicularis racemosa YES Rich Haswell Mineral Co, Shaw Lake 9 Aug 2020 Scrophulariaceae sickletop lousewort
Pediocactus simpsonii [Echinocactus simpsonii] YES Rich Haswell: Rio Grande Co, Pinos Cr. flowering 19 May 2014; Alamosa Co, by dry wash at south edge of the Great Sand Dunes NM, not flowering, 20 July 2021 Yes Cactaceae ball cactus
Penstemon angustifolius [Penstemon caudatus] YES Rich Haswell: Alamosa Co, Great Sand Dunes, head of Mosca Creek trail 29 July 2019 Plantaginaceae narrow-leaved penstemon
Penstemon barbatus [Chelone barbata] YES Rich Haswell: Rio Grande Co, Alder Creek N of South Fork 6 July 2019 Plantaginaceae scarlet penstemon
Penstemon bleaklyi YES: Scott F. Smith Costilla Co, Trinchera Peak 14 Aug 2014 Plantaginaceae Bleakly's penstemon
Penstemon caespitosus YES Rich Haswell Hinsdale Co, CO North Clear Creek falls 22 June 2017 Plantaginaceae mat penstemon
Penstemon crandallii var. crandallii Plantaginaceae Crandall’s penstemon
Penstemon crandallii var. glabrescens [P. fremontii var. glabrescens] [Penstemon linarioides subsp. taosensis] YES Rich Haswell: Conejos Co, Hicks Canyon 23 June 2021 Plantaginaceae Fremont’s beardtongue
Penstemon crandallii var. ramaleyi [Penstemon crandallii subsp. glabrescens] YES Rich Haswell: Saguache Co, CO off CR 14, 1.4 miles E of old Cochetopa pass 18 July 2016 Plantaginaceae Ramaley’s penstemon
Penstemon griffinii YES Rich Haswell Rio Grande Co, CR 630 3 miles N of CR 15 29 June 2021 Plantaginaceae Griffin’s penstemon
Penstemon hallii YES Rich Haswell: Rio Grande Co, near Elwood Pass 2 Aug 2019 Plantaginaceae Hall’s penstemon
Penstemon linarioides Yes: pandarollie: Conejos Co, 3.2 km northwest of Ponderosa cpgd, June 2021 Plantaginaceae toadflax penstemon
Penstemon palmeri YES Rich Haswell: Saguache Co, 3 miles S of Villa Grove by Hwy 285, 28 June 2014 Plantaginaceae crested beardstongue, fuzzytongue penstemon
Penstemon procerus YES Rich Haswell: Saguache Co, meadow below Luders campground 24 Aug 2021 Plantaginaceae little-flower penstemon
Penstemon rydbergii [Penstemon erosus] [Penstemon lacerellus] YES Mary E. McDonald: Conejos Co, in gravel by dam for Trujillo Reservoir, near Cumbres Pass, June 7 2021; Rich Haswell: Mineral Co, near Big Meadows Reservoir 7 Sept 2020 Plantaginaceae Rydberg’s penstemon
Penstemon secundiflorus [Penstemon unilateralis] YES Rich Haswell: Mineral Co, Dry Creek Road south of Creede 28 June 2019 Plantaginaceae side-bells penstemon
Penstemon strictiformis [Penstemon strictus subsp. strictiformis] YES Rich Haswell: Mineral Co, turnoff to Lake Divide trailhead, hwy 160, 23 7 2019 Plantaginaceae Mancos penstemon
Penstemon strictus YES Rich Haswell: Conejos Co, Osier Park, meadow above station, 7 July 2021 Plantaginaceae Rocky Mountain bearstongue
Penstemon teucrioides YES Rich Haswell: Conejos Co, above Terrace Reservoir 15 June 2021 Plantaginaceae germander beardtongue
Penstemon virgatus subsp. asa-grayi [Penstemon unilateralis] YES Rich Haswell: Rio Grande Co, Lookout Mountain just south of Del Norte 16 Aug 2013 yes Plantaginaceae oneside penstemon
Penstemon virgatus subsp. virgatus YES Rich Haswell: Rio Grande Co, Alder Creek N of South Fork 6 July 2019; junction of Cathedral Creek Road and Groundhog Road, 8 miles NW of South Fork, 20 feet from road, associated with Tetradymia, Rosa, Verbena, Erigeron 8 July 2021 Yes Plantaginaceae wand Penstemon
Penstemon whippleanus [Penstemon arizonicus] [Penstemon stenosepalus] YES Rich Haswell Rio Grande Co, Grayback Mountain (budding) 20 July 2015 Plantaginaceae Whipple’s beardtongue
Pericome caudata [Pericome glandulosa] YES Rich Haswell: Saguache Co, Penitente Canyon 25 July 2015 Asteraceae mountain tail-leaf
Peritoma multicaulis [Cleome multicaulis] [Cleomella multicaulis] YES Rich Haswell: Blanca Wetlands 18 Sept 2020 Cleomaceae Mexican beeplant
Peritoma serrulata [Cleome serrulata] [Cleomella serrulata] YES Rich Haswell: Saguache Co, Old Woman's Creek road 24 Aug 2014 Cleomaceae Rocky Mountain beeplant, stinking clover
Persicaria amphibia [Persicaria coccinea] [Polygonum amphibium] etc. YES Rich Haswell: Saguache Co, irrigation dtich by Willow Meadow, Baca NWR 17 Aug 2021; Conejoa Co, bank of the Rio Grande by Hwy 42 bridge 28 July 2021 Polygonaceae aquatic smartweed, scarlet smartweed
Persicaria hydropiper [Polygonum hydropiper] YES Rich Haswell: Rio Grande Co, Del Norte, slough of the Rio Grande 15 Aug 2018 Polygonaceae waterpepper, marsh pepper knotweed
Persicaria lapathifolia Persicaria lapanthifolia [Polygonum lapanthifolia] [Polygonum incarnatum] [Polygonum linicola] etc, YES Rich Haswell: Saguache Co, north boundary of Russell Lakes SWA by old irrigation canal 9 Sept 2022 Polygonaceae pale smartweed
Persicaria maculosa [Persicaria persicaria] [Polygonum persicaria] [Persicaria vulgaris] YES Rich Haswell: Rio Grande Co, Sherman Lake E of Monte Vista 13 Aug 2016 YES Polygonaceae Lady's-thumb knotweed
Persicaria pensylvanica [Polygonum pensylvanicum] YES Rich Haswell: Rio Grande Co, gravel pit 1.5 miles NE of Del Norte, 26 Aug 2020 Polygonaceae Pennsylvania smartweed, pinkweed
Phacelia alba [Phacelia neomexicana var. alba] YES Rich Haswell: Rio Grande Co, Lookout Mountain just S of Del Norte 4 Sept 2021 (seeds); Saguache Co, Penitente Canyon 25 July 2015 Hydrophyllaceae white phacelia
Phacelia bakeri [Phacelia crenulata var. bakeri] YES Scott F. Smith: Stony pass, San Juan Co, 22 July 2021; Rich Haswel: East Willow Creek, Mineral Co, 4 Sept 2013 above Creede Hydrophyllaceae Baker’s phacelia
Phacelia hastata [Phacelia leptosepala] [Phacelia leucophylla] YES Rich Haswell: Mineral Co, Continental Divide north of Wolf Creek Pass 6 Aug 2014 Hydrophyllaceae silverleaf phacelia
Phacelia heterophylla [Phacelia magellanica var. heterophylla] YES Rich Haswell: Mineral Co, Big Meadows Reservoir 14 Aug 2017 Hydrophyllaceae wand phacelia
Phacelia neomexicana YES Mary E. McDonald: Conejos Co, north ridge of Hicks Canyon off FSR 101 1 Aug 2014 Hydrophyllaceae New Mexico scorpion-weed
Phacelia sericea [Eutoca sericea] YES Rich Haswell: Rio Grande Co, near Elwood Pass 2 Aug 2019 Hydrophyllaceae silky phacelia, purple fringe
Phemeranthus confertiflorus [Phemeranthus parviflorus] [Talinum confertiflorum] [Talinum parviflorum] etc. YES Katherine Zybko: Saguache Co, Great Sand Dunes NPP, Deadman's Creek, 31 July 2021 Montiaceae flamethrower, sunbright, phemeranthus
Phlox condensata [Phlox caespitosa var. condensata] YES Rich Haswell: Rio Grande Co, Grayback Mt 11 June 2014 Polemoniaceae alpine phlox
Phlox hoodii [Phlox canescens] [Phlox hoodii var. canescens] [Phlox bryiodes] [Phlox lantana] [Phlox muscoides] Yes Patrick Alexander: Conejos Co, Flattop Mesa, 28 May 2022 Polemoniaceae carpet phlox
Phlox multiflora YES Rich Haswell: Rio Grande Co, Lookout Mountain just SW of Del Norte 25 May 2016 Polemoniaceae flowery phlox, mountain phlox
Phlox pulvinata [Phlox caespitosa subsp. pulvinata] [Phlox variabilis] [Phlox sibirica subsp. pulvinata] YES Rich Haswell: Hinsdale Co, North Clear Creek Falls 23 May 2016 Polemoniaceae cushion phlox
Physalis hederifolia [Physalis hederaefolia] [Physalis comata] [Physalis fendleri] YES Rich Haswell: Saguache Co, Penitente Canyon 21 Nov 2022; 2 Dec 2022 Solanaceae ivyleaf groundcherry
Physaria acutifolia YES Rich Haswell, Mineral Co, 2 miles S of Creede, 23 July 2020 Yes Brassicacea sharpleaf twinpod
Physaria calcicola [Lesquerella calcicola] YES Rich Haswell: Quary trail, east of Del Norte, 10 June 2019 Yes Brassicaceae Rollins Rocky Mountain bladderpod
Physaria montana [Lesquerella montana] YES Rich Haswell: Rio Grande Co, Elephant Rock 6 miles NNE of Del Norte 5 June 2019 Brassicaceae mountain bladderpod
Physaria vitulifera YES Rich Haswell: Mineral Co, S of Creede, rocky slope 0.25 mile NE of the Rio Grande 23 July 2020; Jan Haswell, same location, 2 Aug 2021 Brassicaceae fiddleleaf bladderpod, fiddleleaf twinpod
Physocarpus monogynus [Spiraea monogyna] [Opulaster monogynus] YES Rich Haswell: Rio Grande Co, San Francisco Creek, south of cemetery, east bluffs 23 May 2018 Rosaceae mountain ninebark, low ninebark
Picea engelmannii YES Rich Haswell: Rio Grande Co, Grayback pass 23 June 2020 Pinaceae Engelmann spruce
Picea pungens [Picea parryana] YES Rich Haswell: Rio Grande Co, SE slope above Upper Beaver Creek cpgd 10 June 2020 Pinaceae Colorado blue spruce
Picradeniopsis multiflora [Schkuhria multiflora] [Bahia neomexicana] YES Rich Haswell: Rio Grande Co, South Fork 17 Sept 2017; street side Del Norte 5 Sept 2022 Asteraceae many-flower false threadleaf
Picradeniopsis oppositifolia [Bahia oppositifolia] [Trichophyllum oppositifolium] YES Rich Haswell: Rio Grande Co, 6 Miles NW of Del Norte 17 July 2013 Asteraceae northern bahia, oppositeleaf bahia
Picradeniopsis woodhousei [Achyropappus woodhousei] [Bahia woodhousei] YES Mary E. McDonald: Conejos Co, Fox Creek, beside Hwy 17 15 July 2015, 15 Sept 2022 Asteraceae Woodhouse's false bahia
Pilosella aurantiaca [Hieracium aurantiacum] Yes "gravelghost": Rio Grande Co, 5 km southeast of Del Norte Peak, 8 Aug 2023 Asteraceae orange hawkweed
Pinus aristata YES Rich Haswell: Mineral Co, junction of Hwy 160 and FR 380, 20 Oct 2020 Pinaceae Rocky Mountain bristlecone
Pinus contorta YES Rich Haswell: Saguache Co, Cochetopa pass 30 June 2020 Pinaceae lodgepole
Pinus edulis [Pinus cembriodes var. edulis] YES Rich Haswell: Rio Grande Co, Chico trail just S of Del Norte 3 March 2020 Pinaceae pinyon pine
Pinus flexilis [Apinus flexilis] YES Rich Haswell: Mineral Co, junction of Hwy 160 and FR 380 20 Oct 2020 Pinaceae limber pine
Pinus ponderosa [Pinus brachyptera] YES Rich Haswell: San Francisco Creek (medicine tree) 13 May 2020 Pinaceae ponderosa
Plagiobothrys hispidulus [Plagiobothrys scouleri var. hispidulus]] YES Rich Haswell: Rio Grande Co, Beaver Creek Reservoir, drying edge 11 July 2016; Craig Martin, Conejos Co, Elk Creek, 6 Aug 2020 Boraginaceae popcorn flower, Scouler's popcorn flower
Plantago eriopoda Yes Kyle Jackson: Alamosa Co, near Medano Ranch, Great Sand Dunes PP, 16 June 2019 Plantaginaceae redwool plantain
Plantago lanceolata YES Rich Haswell Rio Grande Co, South Fork vacant lot 28 july 2013 Plantaginaceae ribwort plantain, lanceleaf plantain, English plantain
Plantago major YES Rich Haswell: Rio Grande Co, Rio Grande floodplain by 142 bridge in Del Norte 28 July 2021 Plantaginaceae common plantain, broadleaf plantain, greater plantain, white-man’s foot
Plantago tweedyi Yes Richard Haswell: Rio Grande Co, 1.05 miles WSW of Grayback Pass 17 Aug 2023 Plantaginaceae Tweedy’s plantain
Platanthera aquilonis [Platanthera hyperborea] [Habenaria hyperborea] YES Rich Haswell: Mineral Co, Turcker Ponds 23 July 2019 Orchidaceae northern green orchid
Platanthera huronensis [Orchis huronensis] [Limnorchis hyperborea] [Platanthera hyperborea var. huronensis] YES Rich Haswell: Rio Grande Co, SW side of Bennett Peak 22 July 2014 Orchidaceae Lake Huron green bog orchid, tall northern green orchid
Platanthera obtusata [Lysiella obtusata] [Habenaria obtusata] YES Rich Haswell: Mineral Co, east side of Shaw Lake, 31 July 2017 Yes Orchidaceae one-leaf bog orchid
Platanthera purpurascens [Platanthera tescamnis] [Habenaria neomexicana] [Limnorchis purpurascens] [Platanthera hyberborea var. purpurascens] [Platanthera stricta] [Platanthera saccata] YES Rich Haswell: Mineral Co, above Upper Tucker Pond 23 July 2019 Orchidaceae purple-petal bog orchid
Platanthera tescamnis [Platanthera sparsiflora[ YES Rich Haswell: Mineral Co, upper Tucker Pond 23 July 2019 Orchidaceae intermountain bog orchid, yellow rein orchid, Great Basin bog orchid
Pneumonanthe parryi [Gentiana parryi] [Dasystephana parryi] YES Rich Haswell: Rio Grande Co, Grayback pass 23 Aug 2019 Gentianaceae bottle gentian
Podistera eastwoodiae YES Rich Haswell: Rio Grande Co, Grayback Mt, 23 June 2020 Apiaceae Eastwood’s podistera
Polemonium brandegeei [Gilia brandegeei] [Polemonium mellitum] [Polemonium viscosum YES Rich Haswell: Mineral Co, Willow Creek above Creede 28 June 2019 Polemoniaceae Brandegee’s Jacob’s-ladder
Polemonium confertum [Polemonium grayanum] [Polemonium viscosum var. grayanum] YES Rich Haswell: Rio Grande Co, near Elwood Pass 2 Aug 2019 Polemoniaceae Rocky Mountain Jacob's-ladder
Polemonium foliosissimum [Polemonium molle] [Polemonium flavum] [Polemonium filicinum] [Polemonium pterospermum] YES Rich Haswell: Alamosa Co, Mosca Creek 9 July 2014 Polemoniaceae towering Jacob's-ladder
Polemonium occidentale [Polemonium caeruleum subsp. occidentale] YES Rich Haswell: Rio Grande Co, to of Million Reservoir 11 Aug 2022 Polemoniaceae western Jacob’s ladder
Polemonium pulcherrimum [Polemonium delicatum] YES Rich Haswell: Rio Grande Co, 2 miles S of Grayback pass 6 Aug 2016 Polemoniaceae showy Jacob’s ladder, skunk-leaved polemonium
Polemonium viscosum YES Rich Haswell: Rio Grande Co, Grayback Mt 11 June 2014 Polemoniaceae sky pilot, skunkweed
Polygonum argyrocoleon YES Mary E. McDonald: Conejos Co, 2 miles SW of Los Mogotes 10-11 Sept 2022 Polygonaceae silversheath knotweed
Polygonum aviculare [Polygonum arenastrum] [Polygonum buxiforme] [Polygon neglectum] YES Rich Haswell: Rio Grande Co, Del Norte sidewalk 9 Oct 2019 Polygonaceae Devil’s shoestrings, prostrate knotweed
Polygonum douglasii [Polygonum montanum] [Polygonum tenue var. latifolium] YES Mary E. McDonald: Conejos Co, meadow near Mogote Cpgd, 3 Aug 2017 YES Polygonaceae Douglas’s knotweed
Polygonum erectum [Polygonum erectum var. achoreum] [Polygonum achoreum] YES Rich Haswell: Rio Grande Co, vacant space near floodplain of the Rio Grande 9 Oct 2019 Polygonaceae erect knotweed
Polygonum kelloggii [Polygonum polygaloides subsp. kelloggii] [Polygonum confertiflorum] [Polygonum watsonii] YES Rich Haswell: Saguache Co, on FR 740, 1.57 air miles S of junction with CR 14, 26 Aug 2021 Polygonaceae Kellogg’s knotweed
Polygonum sawatchense [Polygonum douglasii subsp. johnstonii] YES Rich Haswell: Conejos Co, Terrace Reservoir 26 July 2019 Polygonaceae Sawatch knotweed
Populus angustifolia YES Rich Haswell: Rio Grande, town of Del Norte near Rio Grande 10 July 2020 Salicaceae narrowleaf cottonwood
Populus deltoides [Populus deltoides subsp. monilifera] [Populus deltoides subsp. wislizeni] YES Rich Haswell: Rio Grande Co, Del Norte, 9th street and Spruce, 24 May 2020 Salicaceae Eastern cottonwood, Plains cottonwood
Populus nigra YES Rich Haswell: Rio Grande, Del Norte 20 April 2019; 30 June 2021 Salicaceae Lombardy popular, black popular
Populus tremuloides [Populus aurea] YES Rich Haswell: Rio Grande Co, FR 332 above Beaver Creek Reservoir 27 Nov 2021 Salicaceae quaking aspen
Portulaca oleracea [Portulaca retusa] YES Rich Haswell: Rio Grande Co, Del Norte house, edge of garden plot 14 Aug 2021 Portulacaceae common purslane, verdolaga, red root
Potamogeton crispus YES Rich Haswell: Rio Grande Co, Million Reservoir 9 Aug 2018; 10 Oct 2020 Yes Potamogetonaceae curly pondweed
Potamogeton foliosus YES Rich Haswell: Saguache Co, Russell Lakes SWA artesian fed ditch 9/20/2020 Potamogetonaceae leafy pondweed
Potamogeton gramineus YES Rich Haswell: Rio Grande Co, in back of the Sunflour Cafe in Monte Vista 28 July 2021, 11 July 2022 Potamogetonaceae variable-leaf pondweed
Potamogeton natans YES Rich Haswell: Rio Grande Co, eddy of an irrigation ditch behind the Sunflour Café on Hwy 285 1 mile N of Monte Vista 28 July 2021 Potamogetonaceae floating pondweed
Potamogeton nodosus YES Rich Haswell: Rio Grande Co, Monte Vista Wildlife Preserve 21 June 2016 Potamogetonaceae long-leaved pondweed
Potentilla ambigens YES Rich Haswell: Mineral Co, Farmers trailhead 23 July 2020 Rosaceae silkyleaf cinquefoil
Potentilla anserina [Argentina anserina] YES Rich Haswell: Alamosa Co, Russell Lakes State Wildlife Area 29 May 2015; Saguache Co, Willow Meadow, Baca NWR, beside irrigation ditch 17 Aug 2021 Rosaceae silver cinquefoil, silverweed
Potentilla bicrenata [Potentilla concinna var. bicrenata] YES Rich Haswell:Rio Grande Co, Lost Lake, SE of South Fork 9 June 2015 Rosaceae elegant cinquefoil
Potentilla bipinnatifida YES Rich Haswell: Rio Grande Co, Church Creek just before it flows into the South Fork of the Rio Grande, half mile S of South Fork, 27 June 2021 Rosaceae tansy cinquefoil
Potentilla concinna [Potentilla divisa] [Potentilla oblanceolata] [Potentilla proxima] YES Rich Haswell: Rio Grande Co, Grayback pass 23 June 2020 Rosaceae elegant cinquefoil
Potentilla glaucophylla [Potentilla diversifolia var. glaucophylla]] YES Rich Haswell: Rio Grande Co, meadow by pond on Hwy 14 N of Grayback Mt 23 Aug2019 Rosaceae blueleaf cinquefoil
Potentilla gracilis [Potentilla elmeri] [Potentilla fastigiata] [Potentilla jucunda] [Potentilla nuttallii var. glabrata] [Potentilla pectinisecta] YES Rich Haswell: Rio Grande Co, Grayback pass 5 Aug 2021. Rosaceae slender cinquefoil
Potentilla hippiana [Potentilla diffusa] [Potentilla propinqua] YES Rich Haswell: Conejos Co, Osier Station 7 July 2021 Rosaceae woolly cinquefoil
Potentilla hippiana X Potentilla pulcherrima [Potentilla gracilis var. hippianoides] YES Rich Haswell: Rio Grande Co, confluence of Chruch Creek and South Fork of the Rio Ground 29 June 2021 Rosaceae woolly cinquefoil hybrid
Potentilla nivea [Potentilla uniflora] YES Rich Haswell: Rio Grande Co, Grayback Mountain 8 July 2019 Rosaceae alpine cinquefoil
Potentilla norvegica [Potentilla monspeliensis] YES Rich Haswell: Rio Grande Co, north side of the Rio Grande at Del Norte, by irrigation canal 12 June 2021 Rosaceae Norwegian cinquefoil
Potentilla pensylvanica [Potentilla strigosa] YES Rich Haswell: Rio Grande Co, Beaver Creek Reservoir 7 July 2020 Rosaceae Pennsylvania cinquefoil, prairie cinquefoil
Potentilla pulcherrima [Potentilla gracilis var. pulcherrima] [Potentilla filipes] [Potentilla diversifolia] YES Rich Haswell: Rio Grande Co, Grayback pass 5 Aug 2021 Rosaceae beautiful cinquefoil
Potentilla rivalis [Potentilla leucocarpa] [Potentilla millegrana] YES Rich Haswell: Rio Grande Co, by pond of abandoned gravel pit NE of Del Norte 4 July 2022; edge of Beaver Creek Reservoir 12 Aug 2022 Rosaceae brook cinquefoil, river cinquefoil
Potentilla saximontana [Potentilla rubricaulis] [Potentilla hookeriana] YES Richard Haswell: Minersal Co, Lobo Point north of Wolf Creek Pass, 4 Aug 2023 Rosaceae Rocky Mountain cinquefoil, red-stemmed cinquefoil
Primula angustifolia YES Daniel Boyes: Alamosa Co, northwest flank of Blanca Peak, South Zapata Lake trail, elev 11,800', 9 March 2024 Primulaceae alpine primrose
Primula parryi YES Rich Haswell: Rio Grande Co, Grayback pass 23 Aug 2019 Primulaceae Parry’s primrose
Prosartes trachycarpa [Disporum trachycarpum] YES Rich Haswell: Mineral Co, Big Meadows Reservoir (in berry) 19 June 2017 Liliaceae rough-seeded fairybell
Prunella vulgaris var. lanceolata [Prunella pennsylvanica var. lanceolata] YES Rich Haswell: Mineral Co, Tucker Ponds 23 July 2019 Lamiaceae heal-all, selfheal
Prunus virginiana [Padus virginiana] YES Rich Haswell: Rio Grande Co, CO confluence of Church Creek and South Fork of the Rio Grande 29 June 2021 Rosaceae chokecherry, bitterberry
Pseudostellaria jamesiana [Torreyostellaria jamesiana] [Stellaria jamesiana] [Alsine jamesiana] YES Katherine Zybko: Saguache Co, 12.2 miles southwest of Crestone, 22 June 2023 Caryophyllaceae tuber starwort, sticky starwort
Pseudotsuga menziesii [Pseudotsuga mucronata] [Pinus taxifolia var. glauca] [Pseudotsuga taxifolia] YES Rich Haswell: Rio Grande Co, Middle San Francisco Creek trailhead 6 March 2020 Pinaceae Douglas-fir
Pterospora andromedea YES Mary E. McDonald: Conejos Co, the Conejos River between Mogote and Aspen Glade campgrounds 24 Aug 2020 Ericaceae pinedrops, Albany beechdrops, giant bird’s nest
Pulsatilla patens [Pulsatilla nuttalliana] [Anemone patens var. multiflora] [Anemone pulsatilla] [Pulsatilla hirsutissima] [Pulsatilla ludoviciana] [Pulsatilla nuttalliana] YES Rich Haswell: Rio Grande Co, Beaver Creek SW of South Fork, meadow 23 May 2019 Ranunculaceae pasque flower, cutleaf anemone, Nuttall's pasque flower
Purshia tridentata [Cowania stansburiana] YES Mary E. McDonald Conejos Co Along FSR 103(2)B near NM border 7/11/2019; 7/14/2021 Rosaceae bitterbrush
Pyrola asarifolia YES Rich Haswell: Rio Grande Co, Bear Creek S of Del Norte, 17 July 2016 Ericaceae pink wintergreen
Pyrola chlorantha [Pyrola virens] YES Rich Haswell: Mineral Co, Big Meadows Reservpor 14 Aug 2017 Ericaceae greenflowered wintergreen
Pyrola minor [Erxlebenia minor] YES Rich Haswell: Rio Grande Co, by beaver pond on FR 332, 14 July 2020 Ericaceae snowline wintergreen, lesser wintergreen
Pyrrocoma clementis [Happlopappus clementis] YES Rich Haswell: Mineral Co, meadow by FR 528, elev. 11,140', 12 July 2016 Asteraceae tranquil goldenweed
Pyrrocoma crocea [Happlopappus croceus] [Pyrrocoma amplectens] YES Mary E. McDonald: Conejos Co, near Hwy 17 between Fox Creek and Forest Service Rd 250 25 July 2013 Asteraceae curlyhead goldenweed
Pyrrocoma lanceolata [Donia lanceolata] [Haplopappus lanceolatus] YES Rich Haswell: Saguache Co, Russell Lakes SWA 18 Sept 2019 Asteraceae lanceleaf goldenweed
Pyrrocoma uniflora YES Rich Haswell: Saguache Co, Hansons Mill at the end of Pool Table Road 30 July 2015 Asteraceae plantain goldenweed
Ranunculus abortivus YES Craig Martin: Alamosa Co, 1.2 miles east of Mosca Creek trailhead 9 June 2023 Ranunculaceae littleleaf buttercup, kidneyleaf buttercup
Ranunculus alismifolius YES Rich Haswell: Rio Grande Co, 1.1 m. S of Grayback Mt, wet forest opening beside road, 23 June 2020 Ranunculaceae water plantain buttercup
Ranunculus cardiophyllus [Ranunculus nudans] [Ranunculus subsagittatus] YES Rich Haswell: Rio Grande Co, Middle San Francisco Creek trailhead 29 June 2019 Ranunculaceae heartleaf buttercup
Ranunculus flammula [Ranunculus reptans] YES Rich Haswell: Mineral Co, Hunters Lake 8 Aug 2014 Ranunculaceae creeping buttercup, banewort
Ranunculus glaberrimus YES Kathy Biddle: Conejos Co, near Cumbress Pass, 17 June 2023 Ranunculaceae sagebrush buttercup
Ranunculus gmelinii [Ranunculus purshii] YES Mary E. McDonald: Conejos Co, side channel of the Conejos River 29 Sept 2022 Ranunculaceae Gmelin’s buttercup
Ranunculus hyperboreus YES Rich Haswell: Rio Grande Co, Million Reservoir SW of South Fork 26 Aug 2018; Saguache Co, natural pond W of Luders Creek cpgd 22 Aug 2022 Ranunculaceae high northern buttercu0p, arctic buttercup
Ranunculus inamoenus [Ranunculus micropetalus] YES Rich Haswell: Rio Grande Co, Pinos Creek 10 June 2018 Ranunculaceae graceful buttercup
Ranunculus macauleyi YES Rich Haswell: Rio Grande Co, just north of Grayback pass in snow melt and rock fell 5 July 2022 Ranunculaceae Macauley's buttercup
Ranunculus macounii YES Rich Haswell: Alamosa Co, Mosca Cr 30 June 2018 Ranunculaceae Macoun’s buttercup
Ranunculus pensylvanicus YES Rich Haswell: Rio Grande Co, Middle San Francisco Creek trailhead, 10 miles S of Del Norte, by stream 20 Aug 2021; Mary E. McDonald, Conejos Co, beaver dam on Conejos River 7 Sept 2021 Ranunculaceae Pennsylvania buttercup
Ranunculus sceleratus [Hecatonia sceleratus] [Ranunculus earlei] YES Duane A. Dyer: Conejos Co, Cumbres pass 20 June 2023 Ranunculaceae cursed buttercup, blister buttercup
Ranunculus trichophyllus [Batrachium aquatile; Ranunculus aquatilis] YES Rich Haswell: Saguache Co, Baca NWR, Ditch #9 17 Aug 2021 Ranunculaceae water-crowfoot
Ranunculus uncinatus [Ranunculus earlei] YES Maryn E. McDonald: Conejos Co, Conejos River, 3.5 miles upstream from Mogote campground 29 June 2015 Ranunculaceae woodland buttercup
Ratibida columnifera [Ratibida columnaris] [Rudbeckia columnaris] [Rudbeckia columnifera] YES Rich Haswell: Conejos Co, by top of spillway to Terrace Reservoir 26 July 2019 Asteraceae prairie coneflower, Mexican hat
Reseda lutea YES Rich Haswell, Rio Grande Co, CR 38, 7 July 2014 Yes Resedaceae yellow mignonette, wild mignonette, cutleaf mignonette
Rhaponticum repens [Acroptilon repens] [Centaurea repens] YES Rich Haswell: Alamosa Co, Alamosa NWR 26 July 2019; Rio Grande Co, South Fork beside Hwy 160 28 July 2013 Asteraceae Russian knapweed
Rhinanthus minor [Rhinanthus crista-galli] [Rhinanthus rigidus] YES Mary E. McDonald: Conejos Co FSR 250, 3 miles from junction with Hwy 17, 25 July 2018; 18 July 2022 Orobanchaceae yellow-rattle, hayrattle, cockscomb
Rhodiola integrifolia [Tolmachevia integrifolia] [Sedum integrifolium] YES Rich Haswell: Rio Grande Co, saddle between Poison and Bennett peaks 19 June 2017 Uvulariaceae king’s crown, western roseroot, ledge stonecrop
Rhodiola rhodantha [Clementsia rhodantha] YES Janis Haswell: Rio Grande Co, wet meadow 0.5 mile S of Grayback pass 5 Aug 2021 Uvulariaceae redpod stonecrop, queen’s crown
Rhus aromatica [Rhus trilobata] [Schmaltzia affinis] [Schmaltzia anisophylla] etc. YES Rich Haswell: Rio Grande Co, Chico trail just S of Del Norte 3 May 2019 Anacardiaceae fragrant sumac, skunkbush sumac
Ribes aureum [Ribes odoratum] YES Rich Haswell: Rio Grande Co, Del Norte, base of bluff by Hwy 160, 18 May 2019 Grossulariaceae golden currant
Ribes cereum [Ribes inebrians] YES Rich Haswell: Rio Grande Co, rhyolite bluff just west of Del Norte 23 May 2021 Grossulariaceae squaw currant, squaw bush, waxy currant
Ribes inerme [Grossularia inermis] YES Rich Haswell: Rio Grande Co, near Church Creek just SW of South Fork 29 June 2021 Grossulariaceae mountain currant
Ribes laxiflorum [Ribes coloradense] YES YES Rich Haswell: Rio Grande Co, near Fuchs Reservoir, 30 June 2015; 7 Aug 2015 Grossulariaceae trailing currant
Ribes leptanthum [Grossularia leptantha] YES Rich Haswell: Rio Grande Co, Middle San Francisco Creek trailhead 16 May 2019 Grossulariaceae trumpet gooseberry
Ribes montigenum YES Rich Haswell: Mineral Co, Hunters Lake 2 July 2014 Grossulariaceae mountain gooseberry, red prickly currant
Ribes wolfii YES Mary E. McDonald: Conejos Co, 0.25 miles S of the Conejos River 3 June 20; Kara Carragher: Conejos Co, Roarding Gulch confluence with Conejos River, 5 July 202314 Grossulariaceae Wolf’s currant
Robinia neomexicana [Robinia neomexicana X Robinia pseudoacacia] YES Rich Haswell: Rio Grande Co, Del Norte, on pioneer house lot Columbia and Ninth 26 May 2020 Fabaceae New Mexican locust
Robinia pseudoacacia YES Rich Haswell: Rio Grnde Co, Del Norte, 10th street 1 June 2020; 10 July 2021 Fabaceae black locust, false acacia
Rorippa alpina [Rorippa curvipes var. rorippa] YES Rich Haswell: Mineral Co, Alberta Peak S of Wolf Creek pass 28 July 2016 Brassicaceae alpine yellowcress
Rorippa curvipes [Rorippa truncata] [Rorippa sinuata var. truncata] YES Rich Haswell: Rio Grande Co, bank of Beaver Creek, Upper Beaver Creek cpgd 26 July 2018 Brassicaceae bluntleaf yellowcress
Rorippa palustris [Rorippa palustris subsp. hispida] [Rorippa islandica] [Nasturtium palustre] YES Rich Haswell: Rio Grande Co, side channel of the Rio Grande by Del Norte river walk, overhanging water 12 July 2021 Brassicaceae bog yellowcress
Rorippa sinuata [Radicula sinuata] [Nasturtium sinuatum] [Nasturtium brachycarpum] YES Rich Haswell: Rio Grande Co, gravel pit 1.76 air miles NE of Del Norte 20 June 2021 Brassicaceae spreading yellowcress
Rorippa sphaerocarpa [Nasturtium sphaerocarpum] [Radicula sphaerocarpa] [Rorippa obtusa var. sphaerocarpa] YES Rich Haswell: Saguache Co, growing in the drying edge of a lake in the Russell Lakes SWA 18 Sept 2019; edge of Beaver Reservoir 2 Sept 2020 Yes Brassicaceae roundfruit yellowcress
Rosa acicularis [Rosa sayi] YES Mary E. McDonald: Conejos Co 0.5 miles from start of FSR 101 2 July 2020 Rosaceae prickly rose
Rosa nutkana [Rosa blanda] [Rosa woodsii] YES Rich Haswell: Saguache Co, Carnero Creek 8 miles W of La Garita, 13 June 2020 Rosaceae Nutka rose
Rosa woodsii [Rosa blanda] [Rosa manca] [Rosa woodsii subsp. manca] [Rosa woodsii subsp. woodsii] YES Mary E. McDonald: Conejos Co, Conejos River between Mogote and Aspen Glade cpgds 5 July 2022; Rich Haswell: Saguache Co, Carnero Creek 8 miles NNW of La Garita 11 June 2020 Rosaceae Woods' rose
Rubus deliciosus [Bossekia deliciosa] [Oreobatus deliciosus] YES Rich Haswell: Alamosa Co, Mosca Creek 9 July 2014 Rosaceae Boulder raspberry
Rubus idaeus [Rubus aliceae] [Rubus arizonicus] YES Rich Haswell: Rio Grande Co, confluence of Chruch Creek and South Fork of the Rio Grande 29 June 2021, 2017 Rosaceae raspberry, red raspberry
Rubus nutkanus [Rubus parviflorus] [Rubacer parviflorus] YES Mary E. McDonald: Conejos Co, between Mogote campground and Bear Creek housing off Hwy 17, Aug 2013 and Aug 2014; Rosaceae thimbleberry
Rudbeckia hirta [Rudbeckia flava] YES Rich Haswell: Rio Grande Co, by Hwy 160 near South Fork 15 Sept 2016 Asteraceae brown-eyed Susan
Rudbeckia lacinata [Rudbeckia latissima] [Rudbeckia ampla] YES Rich Haswell: Rio Grande Co, Beaver Cr campground W of South Fork 12 July 2017 Asteraceae goldenglow coneflower
Rumex acetosella YES Rich Haswell: Mineral Co, Tucker Ponds 23 July 2019; Big Meadows Reservoir, beside parking lot at trailhead 8 Aug 2019 Yes Polygonaceae sheep’s sorrel, red sorrel
Rumex crispus YES Rich Haswell: Rio Grande, Del Norte, between sidewalk and buillding 15 May 20121 Polygonaceae curly dock, sour dock, yellow dock
Rumex densiflorus YES Rich Haswell: Rio Grande Co, 2 miles S of Grayback Mt. 30 June 2017 Polygonaceae wild rhubarb
Rumex fueginus [Rumex maritimus] YES Rich Haswell: Saguache Co, muddy edge of Russell Lake 20 Sept 2019 Polygonaceae Tierra del Fuego dock, golden dock, American dock
Rumex occidentalis [Rumex aquaticus var. fenestratus] YES Rich Haswell: Saguache Co, 5 m. E of the junction of Hwy 114 and CR 14, rhyolite cliff seep 18 July 2016 Polygonaceae western dock
Rumex triangulivalvis [Rumex salicifolius subsp. triangulivalvis] YES Rich Haswell: Rio Grande Co, by CR 14, 5.3 air miles SW of Del Norte 17 June 2020 Polygonaceae Mexican dock
Sabulina macrantha [Alsinanthe macrantha] [Minuartia macrantha] [Alsinopsis macrantha] YES Rich Haswell: Conejos Co, Elwood pass 2 Sept 2019 Caryophyllaceae House’s mock sandwort
Sagina caespitosa [Sagina nivalis var. caespitosa] [Spergella caespitosa] YES Rich Haswell: Rio Grande Co, tundra, vicinity of Grayback pass 14 July 2016; 8 July 2019 Caryophyllaceae tufted pearlwort
Sagina saginoides [Spergula saginoides] YES Rich Haswell: Conejos Co near La Manga Creek 1 mile N of Hwy 17 and FSR 118, 2 Aug 2022 Caryophyllaceae alpine pearlwort
Sagittaria cuneata [Sagittaria arifolia] YES Rich Haswell: Saguache Co, Russell Lakes SWA 3 July 2016 Alismataceae arumleaf arrowhead
Salicornia rubra [Salicornia europaea subsp. rubra] YES Rich Haswell: Saguache Co, Russell Lakes SWA saline playa 23 Aug 2014; Alamosa Co, Blanca Wetlands 13 Sept 2018 Amaranthaceae red swampfire
Salix amygdaloides Yes Suzanne Dingwell: Alamosa Co, Alamosa NWP 23 Sept 2023 Salicaceae peach-leaf willow
Salix arizonica YES Mary E. McDonald Conejos Co, along La Manga Creek 12 June 2022 Salicaceae Arizona willow
Salix babylonica YES Rich Haswell: Rio Grande Cp, 2.6 miles W of Del Norte, on Hwy 160, 26 May 2020 Salicaceae weeping willow
Salix bebbiana [Salix perrostrata] [Salix rostrata] YES Rich Haswell: Rio Grande Co, Del Norte, by side channel of Rio Grande, south side of river 22 May 2020 Salicaceae Bebb's willow
Salix brachycarpa YES Rich Haswell: Mineral Co, Hope Creek and road to Shaw Lake from Big Meadow Reservoir 9 June 2020 Salicaceae shortfruit willow
Salix drummondiana [Salix subcaerulea] YES Mary E. McDonald: Conejos Co, near Trujillo Reservoir dam 10 June 2022 Salicaceae Drummond’s salix
Salix exigua YES Rich Haswell: Rio Grande, Del Norte by Rio Grande 15 June 2020 Salicaceae coyote willow, narrowleaf willow
Salix geyeriana YES: FrontRangeWildflowers: Hinsdale Co, Thirtymile cpgd, 11 July 2020; Rich Haswell: Rio Grande Co, Tewksbury trailhead, 26 May 2020 Salicaceae Geyer’s salix
Salix glauca [Salix glaucops] [Salix pseudolapponum] [Salix villosa] YES Rich Haswell: Rio Grande Co, Alder Creek 2 miles N of South Fork 21 May 2020 Salicaceae gray willow, grayleaf willow
Salix lasiandra [Salix lucida subsp. lasiandra] YES Rich Haswell: Rio Grande Co, Del Norte, by Rio Grande 22 May 2020 Salicaceae Pacific willow
Salix ligulifolia [Salix eriocephala var. ligulifolia] [Salix lutea var. ligulifolia] YES Rich Haswell, Rio Grande Co, Del Norte, river walk, 22 May 2020 Salicaceae strapleaf willow
Salix monticola [Salix cordata var. monticola] [Salix padophylla] [Salix pseudomonticola] YES Rich Haswell, Rio Grande Co., upper end of Million Reservoir, west of South Fork, 22 May 2020 Salicaceae mountain willow
Salix nivalis [Salix reticulata var. nivalis] [Salix saximontana] YES Rich Haswell: Rio Grande Co, Grayback Pass (in seed) 16 Aug 2017 Salicaceae snow willow
Salix petrophila [Salix arctica subsp. petraea] [Salix arctica var. petrophila] YES Rich Haswell: Mineral Co, Continental Divide south of Wolf Creek Pass 18 July 2014 Salicaceae alpine willow, Rocky Mountain willow
Salix planifolia [Salix monica] [Salix phylicifolia var. monica] YES Rich Haswell: Rio Grande Co, by beaver pond west of Crystal Lakes 23 June 2020 Salicaceae planeleaf willow, tea-leaf willow, diamondleaf willow
Salix wolfii YES Mary E. McDonald: Conejos Co, on FSR 114 near La Manga Creek, 16 June 2022 Salicaceae Wolf’s willow
Salix x fragilis [Salix fragilis] YES Rich Haswell: Rio Grande, Del Norte, old planted trees and young shoots throughout the town, 20 May 2020 Salicaceae crack willow
Salsola collina YES Rich Haswell: Alamosa Co, CO one mile S of the Great Sand Dunes NM tolling station 20 July 2021 Amaranthaceae slender Russian thistle
Salsola paulsenii [Salsola pestifer] [Kali paulsenii] YES: iNaturalist observation #183924205, Costilla Co, 1.6 km south of bridge over the Rio Grande; iNaturalist observation #131687707, Alamosa Co, 16.7 air miles ENE of Alamosa Amaranthaceae barbwire Russian thistle
Salsola tragus [Kali tragus] [Salsola australis] [Salsola kali] YES Rich Haswell: Rio Grande Co, within town limits of Del Norte, 24 Aug 2020 Amaranthaceae prickly Russian thistle, windwitch, tumbleweed
Salvia reflexa [Salvia lancifolia] YES Mary E. McDonald, Conejos Co, beside Hwy 17 between Mogote and Fox Creek, cliff side 1 Oct 2020 Lamiaceae Rocky Mountain sage
Sambucus racemosa [Sambucus melanocarpa] [Sambucus microbotrys] [Sambucus pubens] YES Rich Haswell: Mineral Co, Big Meadows Reservoir 26 Aug 2019 Viburnaceae [Adoxaceae] red elderberry
Saponaria officinalis YES Rich Haswell: Del Norte 10 Oct 2016 [by street, escaped?) Caryophyllaceae bouncing bet
Sarcobatus vermiculatus [Batis vermiculata] YES Rich Haswell: Saguache Co, Russell Lakes SWA 7 Aug 2018 Sarcobataceae greasewood, seepwood, saltbush
Saxifraga austromontana [Saxifraga bronchialis] YES Rich Haswell: Mineral Co, CO above Cathedral cpgd on Embargo Creek 26 July 2016 Saxifragaceae matted saxifrage, spotted saxifrage
Saxifraga debilis [Saxifraga rivularis] [Saxifraga hyperborea subsp. debilis] YES Rich Haswell: Mineral Co, Big Meadows Reservoir 20 June 2015 Saxifragaceae highland saxifrage, weak saxifrage, alpine brook saxifrage
Saxifraga flagellaris [Hirculus platysepalus subsp. crandallii] [Leptasea crandallii] [Saxifraga crandallii] Yes Joseph Kleinkopf: Rio Grande Co, west side of Grayback Mountain near the utility road 12 July 2023 Saxifragaceae whiplash saxifrage
Scrophularia lanceolata [Scrophularia occidentalis] YES Rich Haswell: Alamosa Co, Great Sand Dunes 6 June 2017 Scrophulariaceae lanceleaf figwort, early figwort
Scutellaria epilobiifolia [Scutellalria galericulata] [Scutellaria galericulata var. epilobiifolia] YES Rich Haswell: Saguache Co, Russell Lakes Wildlife Preserve 22 July 2016 Lamiaceae marsh skullcap
Sedum lanceolatum [Amerosedum lanceolatum] [Sedum stenopetalum] YES Rich Haswell: Mineral Co, Big Meadows Reservoir 14 Aug 2017 Crassulaceae yellow stonecrop, spearleaf stonecrop
Senecio amplectens [Ligularia amplectens] [Ligularia holmii] YES Rich Haswell: Mineral Co, Alberta Peak S of Wolf Creek Pass 9/6/2016 Asteraceae showy alpine ragwort
Senecio atratus YES YES Rich Haswell: Rio Grande Co, alongside road, near Fuchs Reservoir 20 July 2013 Asteraceae tall blacktip ragwort
Senecio bigelovii [Ligularia bigelovii] [Senecio accedens] [Senecio scopulinus] YES Rich Haswell: Rio Grande Co, 1 mile S of Grayback Pass 8/12/2020 Asteraceae nodding groundsel
Senecio crassulus [Senecio lapathifolius] YES Rich Haswell: Rio Grande Co, near Elwood Pass 2 Aug 2019 Asteraceae mountain-meadow ragwort
Senecio eremophilus [Senecio ambrosioides] [Senecio kingii] [Senecio macdougalii] YES Rich Haswell: Mineral Co, East Willow Creek above Creede 2 Aug 2021 Asteraceae desert ragwort
Senecio fremontii [Senecio blitoides] [Senecio carthamoides] [Senecio fremontii var. blitoides] YES Rich Haswell: Mineral Co, Hunters Lake, 11 air miles SWW of South Fork, 8 Aug 2014 Asteraceae dwarf mountain ragwort
Senecio integerrimus YES Rich Haswell: Rio Grande Co, Trout Creek trailhead, SW of South Fork, sloping meadow, 30 May 2021 Asteraceae lamb’s tongue ragwort
Senecio pudicus [Senecio cernuus] [Ligularia pudica] YES Rich Haswell: Alamosa Co, Mosca Creek 0.5 miles from trailhead 28 July 2017 Asteraceae bashful ragwort
Senecio serra [Senecio admirabilis] YES Rich Haswell: Saguache Co, just E of Carnero Pass 23 Aug 2015 Asteraceae tall ragwort
Senecio soldanella [Ligularia soldanella] YES Rich Haswell: Grayback Mountain, Rio Grande Co, 14 July 2016 Astersceae Colorado ragwort
Senecio spartioides [Senecio multicapitatus] YES Rich Haswell: Rio Grande Co, Pinos Creek Road 28 July 2017; Rio Grande Co, town of Del Norte, edge of parking lot 12 Aug 2021 Asteraceae broom-like ragwort
Senecio taraxacoides [Ligularia taraxacoides] [Senecio amplectens var. taraxacoides] YES Loraine Yeatts Conejos Co, flank of Conejos Peak 7 Aug 2008 Asteraceae dandelion ragwort
Senecio triangularis YES Rich Haswell: Rio Grande Co, mesic meadow, 0.5 miles S of Grayback Pass 5 Aug 2021 Asteraceae arrowleaf ragwort
Senecio vulgaris YES Rich Haswell: Rio Grande Co, Del Norte alleys and yards 16 July 2014; observed also in 2020 Asteraceae common groundsel
Senecio wootonii YES Rich Haswell: Mineral Co, Big Meadows Reservoir 29 May /2017 Asteraceae Wooton’s ragwort
Shepherdia canadensis [Lepargyrea canadensis] [Hippophaë canadensis] YES Rich Haswell: Rio Grande Co, San Francisco Cr, quarter mile from trailhead, in aspen grove, male plant in flower 24 May 2020 Elaeagnaceae russet buffaloberry, bullberry, rabbitberry, beef-suet tree
Sibbaldia procumbens [Potentilla sibbaldii] YES Rich Haswell: Rio Grande Co, Grayback Mt 23 Aug 2019 Rosaceae creeping sibbaldia
Sidalcea candida YES Rich Haswell: Mineral Co, Lake Trail trailhead on Hwy 160, 5 Aug 2019 Malvaceae white checkermallow
Sidalcea neomexicana [Sidalcea parviflora var. thurberi] YES Rich Haswell: Rio Grande Co, Alder Creek north of South Fork 8 July 2019 Malvaceae New Mexico checkermallow, Rocky Mountain checkermallow
Silene acaulis YES Rich Haswell: Rio Grande Co, Grayback Mt 8 July 2019 Caryophyllaceae moss campion, moss catchfly
Silene drummondii [Lychnis drummondii] YES Rich Haswell: Rio Grande Co, south side of Bennett Peak 22 July 2014 Caryophyllaceae Drummond’s campion
Silene latifolia [Lychnis alba] [Melandrum album] [Silene latifolia subsp. alba] YES Rich Haswell: Rio Grande Co, by the parking-area latrine at the trailhead for the north trail around Big Meadows Reservoir 26 Aug 2019 Caryophyllaceae white campion
Silene menziesii [Anotites menziesii] YES Rich Haswell: Mineral Co, Big Meadows Reservoir, 17 July 2015 Caryophyllaceae Menzies catchfly
Silene scouleri [Silene scouleri subsp. hallii] [Silene concolor] [Silene hallii] [Silene scouleri var. concolor] YES Rich Haswell: Rio Grande Co, Middle San Francisco Creek trailhead 31 July 2016 Caryophyllaceae simple campion, Scouler's catchfly
Sisymbrium altissimum [Noria altissima] YES Richard Haswell: Conejos Co, junction of Hwy 17 and CR 101, 23 June 2021 Brassicaceae tall tumblemustard, Jim Hlll mustard
Sisymbrium linifolium [Schoenocrambe linifolia] YES Rich Haswell: Rio Grande Co, Del Norte street side 25 Juy 2014; Beaver Creek Reservoir 7 July 2020 Brassicaceae flaxleaf hedge mustard
Sisymbrium loeselii YES Mary McDonald: Conejos Co, 4 km south of Fox Creek community, 25 Sept 2023 Brassicaceae Loesel's rocket
Sisyrinchium demissum YES Katherine Zybko, Saguache Co, Great Sand Dunes NP 26 June 2022 Iridaceae stiff blue-eyed grass
Sisyrinchium montanum YES Mary E. McDonald: Conejos Co, on the Conejos River 2 miles upstream of FSR 250 and Hwy 17, 6 July 2021 Iridaceae Rocky Mountain stargrass
Sium suave YES Rich Haswell: Saguache Co, Russell Lakes WP 20 Sept 2020 Apiaceae water parsnip
Smelowskia americana [Smelowskia calycina var. americana] YES Rich Haswell: Rio Grande Co, Grayback Mt 14 July 2016 Brassicaceae alpine Smelowskia
Solanum physalifolium [Solanum physalifolium var. nitidisacatum] [Solanum nitidisaccatum] [Solanum americanum] [Solanum nigrum] [Solanum sarrachoides] [Solanum styleanum] YES Rich Haswell; Rio Grande Co, Alder Creek Rd N of South Fork 13 Sept 2017] Solanaceae Argentine nightshade, hoe nightshade
Solanum rostratum YES Rich Haswell: Rio Grande Co, Del norte street sides, 11 July 2019, 30 July 2021, 15 July 2022 Yes Solanaceae buffalobur, Colorado bur, Kansas thistle
Solanum triflorum YES Rich Haswell: Alamosa Co, Great Sand Dunes 13 Sept 2017; Rio Grande Co, Del Norte mulch bin 24 June 2019 Solanaceae cutleaf nightshade
Solidago altissima [Solidago canadensis var. scabra] YES Mary E. McDonald: Conejos Co, between Aspen Glade and Mogote campgrounds 22 July 2015; Rich Haswell: Rio Grande Co, Del Norte park on north side of the Rio Grand 17 Aug 2022 Asteraceae tall goldenrod
Solidago missouriensis [Soliago concinna] [Solidago duriuscula] [Solidago glaberrima] [etc.] YES Mary E. McDonald: Conejos Co, near the Conejos River, one mile downstream from Aspen Glade campground 31 July 2017 Asteraceae Missouri goldenrod
Solidago multiradiata [Aster multiradiatus] [Solidago algida] [Solidago ciliosa] ec.t YES Rich Haswell: Rio Grande Co. South slope of Bennett Mt 22 July 2014 Asteraceae Rocky Mountain goldenrod
Solidago nemoralis YES Cassidy Johnson: Rio Grande Co, 2.5 air miles southwest of South Fork, 4 April 2024 Asteraceae common goldenrod, gray goldenrod, old field goldenrod
Solidago simplex [Solidago spathulata] [Solidago gigantea[ [Solidago glutinosa] [etc.] YES Rich Haswell: Rio Grande Co, Grayback pass 12 Aug 2020 Asteraceae Mt. Alpert goldenrod, sticky goldenrod
Solidago velutina [Solidago canadensis] [Solidago californica] [Solidago sparsiflora] [Aster sparsiflorus] etc. YES Rich and Jan Haswell: Mineral Co, Farmers trailhead S of Creede 2 Aug 2021 Asteraceae three-nerve goldenrod
Sonchus arvensis [Sonchus uliginosus] [Sonchus arvensis var. arvensis] [Sonchus arvensis var. uliginosus] YES Rich Haswell: Rio Grande Co, Del Norte by railroad tracks 28 Aug 2016 Asteraceae perennial sow thistle
Sonchus oleraceus YES Rich Haswell: Rio Grande Co, by slough of the Rio Grande near Del Norte 11 Aug 2018 Asteraceae common sow thistle, hare’s colwort
Sorbus scopulina [Sorbus dumosa] YES Russell Clark: Rio Grande Co, east flank of Del Norte peak 11 Sept 2022 Rosaceae Greene’s mountain ash, Western mountain ash
Sparganium emersum YES Rich Haswell: Mineral Co, Tucker Ponds, SW of South Fork, 20 Aug 2016; 10 Sept 2021 Tyophaceae emergent bur-reed
Spergularia rubra [Arenaria rubra] [Tissa rubra] Yes Mary E. McDonald: along Forest Service road 113 "just below La Manga Pass off Hwy 117, 5 July2014; Rich Haswell, Conejos Co, Platoro 7 July 2021; Rich Haswell: Conejos Co, logging road above La Manga Creek 2 Aug 2022; Rich Haswell, by natural pond at Cumbres pass 2 Aug 2022 Caryophyllaceae red sandspurry
Sphaeralcea coccinea [Malva coccinea] [Malvastum coccineum] [Sphaeralcea dissecta] YES Rich Haswell: Saguache Co, Biedell Creek N of La Garita 31 May 2019 Malvaceae scarlet globemallow
Sphaeralcea fendleri [Sphaeralcea leiocarpa] [Sphaeralcea tripartita] YES Rich Haswell: Saguache Co, Penitente Canyon parking area 25 July 2018 Malvaceae Fendler’s globemallow
Sphaeralcea parvifolia [Sphaeralcea arizonica] [Sphaeralcea marginata] YES Rich Haswell: Rio Grande Co, 2 miles E of South Fork by Hwy 160, 26 June 2019 Malvaceae small-leafed globemallow
Sphaerophysa salsula [Swainsonia salsula] YES Rich Haswell: Alamosa Co, 3 air miles SW of Monte Vista (over-wintered pods still attached) 28 March 2019 Fabaceae alkali Swainson pea, buyan, Austrian peaweed
Spiranthes romanzoffiana [Ibidium strictum] Yes: Mary E. McDonald: Conejos Co, wetland off Forest Service Road 113, just below La Manga Pass, 20 July 2021; Rich Haswell and Mary McDonald, natural pond at Cumbres pass 2 Aug 2022 Orchidaceae hooded ladies’ tresses
Spirodela polyrhiza [Spirodela polyrrhiza] YES Rich Haswell: Rio Grande Co, old irrigation ditch behind the Sunflour Café by Hwy 285 1 mile N of Monte Vista 13 July 2021 Araceae common duckmeat
Stachys pilosa [Stachys palustris] [Stachys scopulorum] YES Rich Haswell: Rio Grande Co, ditch by Hwy 160 between Del Norte and South Fork 7 May 2016 Lamiaceae hairy hedgenettle
Stellaria irrigua [Stellaria umbellata] [Alsine baicalensis] [Stellaria weberi] YES Rich Haswell: Rio Grande Co, one mile E of Shaw Meadow on CR 359, 24 June 2015; Mineral Co, Shaw Lake 19 June 2018 Caryophyllaceae umbrella starwort, Altai starwort
Stellaria longifolia [Alsine longifolia] YES Rich Haswell: Rio Grande Co, Middle San Francisco Creek trailhead 16 July 2021 Caryophyllaceae longleaf starwort
Stellaria longipes [Alsine laeta] [Alsine longipes] [Stellaria laeta] YES Rich Haswell: Saguache Co, Cochetopa pass 30 June 2020 Caryophyllaceae longstalk starwort
Stellaria media [Alsine media] YES Rich Haswell: Rio Grande Co, in lawn of Del Norte private property 15 July 2013; 4 Sept 2014; 25 June 2021; 19 July 2022 Caryophyllaceae common chickweed, stitchwort
Stellaria sanjuanensis [Stellaria irrigua] [Alsine polygonoides] YES Loraine Yeatts: Conejos Co, flank of Conejos Peak 7 Aug 2008 Caryophyllaceae Altai starwort
Stephanomeria pauciflora [Prenanthes pauciflora] YES Rich Haswell: Alamosa Co, Great Sand Dunes 22 July 2015; Saguache Co, 6 miles W. of La Garita 11 Aug 2020 Asteraceae brownplume wirelettuce
Streptopus amplexifolius [Uvularia amplexifolia] YES Rich Haswell: Mineral Co, Shaw Lake 7 June 2017 Liliaceae clasping twistedstalk, watermelon berry
Stuckenia filiformis [Potamogeton filiformis var. alpinus] YES Rich Haswell Saguache Co, Russell Lakes SWA Ditch to pond off CR 48, 20 Sept 2020 Potamogetonaceae fineleaf pondweed
Stuckenia pectinata [Potamogeton pectinatus] YES Rich Haswell: Rio Grande Co, abandoned gravel pit pond, 1.5 NE of Del Norte 8/22/2021 Potamogetonaceae sago pondweed, fennel pondweed
Suaeda calceoliformis [Chenopodium calceoliforme] [Suaeda depressa] YES Rich Haswell: Alamosa Co, 0.5 miles W of Alalmosa by alkaline run-off pool 30 Sept 2020 Amaranthaceae Pursh seepweed, horned seablite
Swertia perennis [Swertia palustris] YES Rich Haswell: Rio Grande Co, 1 mile S of Grayback pass 23 Aug 2019 Gentianaceae star gentian
Symphoricarpos oreophilus [Symphoricarpos rotundifolius] YES Mary E. McDonald: Conejos Co, by the Conejos River near the confluence of Fox Creek 18 June 2015; 22 Sept 2021 Caprifoliaceae mountain snowberry
Symphoricarpos rotundifolius [Symphoricarpos oreophilus] [Symphoricarpos palmeri] [Symphoricarpos utahensis] YES Rich Haswell: Rio Grande Co, Shaw Meadow SE of South Fork 1 mile S of Hwy 160, 25 June 2019 Caprifoliaceae roundleaf snowberry
Symphyotrichum ascendens [Aster ascendens] [Aster vallidola] [Aster chilensis subsp. ascendens] YES Rich Haswell: Saguache Co, Saguache city park 8 Sept 2014; Rio Grande Co, Del Norte yard 29 Aug 2019 Asteraceae western aster
Symphyotrichum ciliatum [Aster brachyactis] [Erigeron ciliatus] YES Rich Haswell: Saguache Co, Russell Lakes SWA 18 Sept 2019 Asteraceae rayless alkali aster
Symphyotrichum ericoides [Aster ericoides] [Aster hebecladus] [Aster multiflorus] YES Mary E. McDonald: Conejos Co, FSR 103(2)B dry, grassy habitat 28 Aug 2017 Asteraceae heath aster
Symphyotrichum falcatum [Aster falcatus] YES Rich Haswell: Saguache Co, Bauchmann Creek 10 miles NE of South Fork 25 Sept 2019 Asteraceae white prairie aster
Symphyotrichum foliaceum [Aster foliaceus] YES Rich Haswell: Rio Grande Co, by CR 14 S of Grayback pass 6 Aug 2016 Asteraceae leafy aster, alpine leafybract aster
Symphyotrichum frondosum [Aster frondosus] [Aster woodhousei] [Brachyactis frondosum] [Bractyactis woodhousei] [Tripolium frondosum] YES Rich Haswell: Saguache Co, Russell Lakes SWA 18 Sept 2019 Asteraceae short-rayed alkali aster
Symphyotrichum lanceolatum [Aster hesperius] [Aster caerulescens var. wootonii] [Aster laetivirens var. wootonii] YES Rich Haswell: Alamosa Co, Alamosa Wildlife Preserve 11 Aug 2016 Asteraceae panicled aster
Symphyotrichum porteri [Aster porteri] YES Rich Haswell: Rio Grande Co., edge of Sherman Lake E of Buena Vista 13 Aug 2016 Asteraceae Porter’s aster
Symphyotrichum spathulatum [Aster spathulatus] [Aster corymbiformis] [Aster fremontii] [Aster occidentalis] YES Rich Haswell: Mineral Co, Tucker Ponds, forest opening by pond 10 Sept 2021 Asteraceae western mountain aster
Tanacetum vulgare YES Mary E. McDonald, Conejos Co, lower end of Foreset Service Rd 103 30 Aug 2021 Asteraceae common tansy
Taraxacum ceratophorum [Taraxacum ovinum] [Leontoon ceatophorus] [Taraxacum ambigens var. fultius] etc. YES Craig Martin: Conejos Co, headwaters of Manga Creek, 5 Aug 2020 Asteraceae horned dandelion
Taraxacum erythrospermum [Taraxacum laevigatum var. erythrospermum] [Taraxacum officinale var. erythrospermum] YES Rich Haswell: Rio Grande Co, Del Norte between street and lawn 18 June 2023 Asteraceae red-seeded dandelion
Taraxacum officinale YES Rich Haswell: Rio Grande Co, Del Norte yard 1 June 2019 Asteraceae common dandelion
Tetradymia canescens [Tetradymia inermis] YES Rich Haswell: Rio Grande Co, junction of Groundhog and Embargo Creek roads 8 July 2021 Asteraceae spineless horsebrush
Tetraneuris acaulis var caespitosa [Hymenoxys acaulis var. caespitosa] YES Rich Haswell: Rio Grande Co Del Norte saddle 1.2 miles west of town 28 April 2020 Asteraceae stemless four-nerve daisy
Tetraneuris acaulis var. acaulis [Actinea acaulis] [Actinella acaulis] [Hymenoxys acaulis] etc. YES Rich Haswell: Rio Grande Co, quarry trail 4.8 air miles E of Del Norte 10 June 2019 Asteraceae stem-less four-nerved daisy
Thalictrum fendleri [Thalictrum wrightii] YES Rich Haswell: Rio Grande Co, Church Creek just SW of South Fork 29 June 2021 Thalicraceae Fendler’s meadow-rue
Thelesperma filifolium [Thelesperma formosum] [Thelesperma intermedium] [thelesperma trifidum] YES Rich Haswell: Great Sand Dunes 2 July 2013 Yes Asteraceae stiff greenthread
Thelesperma subnudum YES Rich Haswell: Rio Grande Co, Ridge E. of Elephant Rocks 26 June 2015 Yes Asteraceae Havajo tea
Thelypodium integrifolium [Pleurophragma gracilipes] YES Katherine Zybko: Saguache Co, Indian Spring, Great Sand Dunes NPP 25 June 2022 Brassicaceae entireleaf thelypody
Thermopsis montana [Thermopsis rhombifolia var. montana] [Thermopsis pinetorum] YES Rich Haswell: Mineral Co, Shaw Lake 9 July 2020 Fabaceae mountain goldenbanner, golden-pea
Thermopsis rhombifolia [Thermopsis arenosa] [Thermopsis rhombifolia var. rhombifolia] YES Rich Haswell: Rio Grande Co, just N of Del Norte 28 April 2021 Fabaceae prairie goldenbanner, prairie golden-pea
Thlaspi arvense YES Rich Haswell: Saguache Co, side of Hwy 14 as it passes Luders Creek campground 25 Aug 2021; Rio Grande Co, on trail to Million Reservoir 11 Aug 2022 Brassicaceae fanweed, field pennycress
Tonestus pygmaeus [Haplopappus pygmaeus] [Stenotus pygmaeus] YES Rich Haswell: Rio Grande Co, FR 380 near Elwood Pass 2 Aug 2019 Asteraceae pygmy goldenweed, pygmy serpentweed
Townsendia exscapa [Aster exscapus] [Townsendia sericea] YES Rich Haswell: Rio Grande Co, San Francisco Cr. trailhead 26 April 2014; 12 June 2014 Asteraceae stemless Easter daisy, stemless Townsend's daisy
Townsendia grandiflora YES Mary E. McDonald: Conejos Co, Forest Ser;vice Road 101 31 May 2014 Asteraceae largeflower Easter daisy
Tradescantia occidentalis [Tradescantia virginiana var. occidentalis] YES Bonnie Webster: Saguache Co, Creston street side, 2 July 2019 Commelinaceae prairie spiderwort
Tragopogon dubius YES Rich Haswell: Rio Grande Co, private yard, Del Norte 23 June 2019 Asteraceae Western salsify
Tragopogon pratensis YES Rich Haswell: Rio Grande Co, Del Norte, house 17 June 2013; Hinsdale Co, Clear Creek Falls 22 June 2017 Asteraceae meadow salsify
Trautvetteria caroliniensis YES Mary E. McDonald: Conejos Co, Red Lake Trail above La Manga Pass 2014; Rich Haswell, Conejos Co, Red Lake trailhead 3 Aug 2020 Ranunculaceae Caroline bugbane, false bugane, tasselrue
Tribulus terrestris YES Rich Haswell: Rio Grande Co, Del Norte, 11th street 7 July 2014 to 14 Sept 2022 Yes Zygophyllaceae puncturevine, caltrops, goat’s-head, devil’s eyelashes, tackweed
Trifolium attenuatum YES Rich Haswell: Rio Grande Co, Grayback Mt 8 July 2019 Fabaceae subalpine clover
Trifolium brandegeei YES Lisa Lou: Rio Grande Co, San Francisco Creek valley, el. 8,500' 23 June 2021 Fabaceae Brandegee’s clover
Trifolium dasyphyllum YES Rich Haswell: Mineral, Continental Divide trail north of Wolf Creek Pass 20 Aug 2016 Fabaceae shaggy-leaf clover
Trifolium fragiferum YES Rich Haswell: Conejos Co, in floodplain of the Rio Grande, below bridge on Hwy 142, west side of the river 7/28/2021 Fabaceae strawberry clover
Trifolium hybridum YES Rich Haswell: Rio Grande Co, Del Nortel bank of the Rio Grande 12 July 2021 Fabaceae Alsike clover
Trifolium incarnatum Yes Audra McKay-Webster, Rio Grande Co, Alder Creek 1.76 air miles northeast of South Fork, 4 Aug 2020 Fabaceae crimson colver
Trifolium longipes [Trifolium rusbyi subsp. reflexum] [Trifolium rydbergii] YES Rich Haswell: Mineral Co, Hanson's Mill at end of Pool Table Rd 30 July 2015 Fabaceae longstalk clover
Trifolium nanum YES Rich Haswell: Rio Grande Co, Grayback Mt 24 June 2014 Fabaceae dwarf clover
Trifolium parryi YES Rich Haswell, Rio Grande Co, near Elwood pass 2 Aug 2019 Fabaceae Parry’s clover
Trifolium pratense YES Rich Haswell: Rio Grande, San Francisco Creek, beside trail, 18 July 2018 Fabaceae red clover
Trifolium repens YES Rich Haswell: Rio Grande Co, San Francisco Creek trail 20 Aug 2021 Fabaceae field clover, Dutch white clover
Trifolium wormskioldii [Trifolium wormskjoldii] YES Rich Haswell: Saguache Co, Russell Lakes WP 24 July 2016 Fabaceae cow clover
Triglochin maritima [Triglochin concinna] YES Rich Haswell: Saguache Co, Russell Lakes SWA 20 Sept 2020 Juncaginaceae seaside arrowgrass
Triglochin palustris [Triglochin palustre] YES Katherine Zybko Saguache Indian Spring, Great Sand Dunes NPP, 25 June 2023 Juncaginaceae slender arrowgrass
Tripleurospermum inodorum [Matricaria inodora] [Chamomilla inodora] [Matricaria maritima subsp. inodora] [Tripleurospermum maritimum] etc. YES Rich Haswell: Mineral Co, Above Creede by Willow Cr. 4 July 2014; Mary E. McDonald: Conejos Co, near Elk Creek cpgd 29 Sept 2015 Asteraceae scentless mayweed, wild chamomile
Tripterocalyx micranthus [Abronia micrantha] YES Rich Haswell: Alamosa Co, the Great Sand Dunes 17 Aug 2015 Nyctaginaceae smallflower sand verbena
Trollius laxus [Trollius americanus] [Trollius laxus subsp. albiflorus] [Trollius albiflorus] YES Rich Haswell: Rio Grande Co, 3 miles S of Grayback Mt, wet meadow 14 July 2020 Ranunculaceae western globeflower
Turritis glabra [Arabis glabra] YES Rich Haswell: Mineral Co, Shaw Lake, SW of South Fork, 22 June 2016 Brassicaceae tower mustard
Typha latifolia YES Rich Haswell: Saguache Co, Russel Lakes SWA 20 April 2019 Typhaceae broad-leaved cat-tail
Ulmus pumila YES Rich Haswell: Rio Grande Co, Del Norte, private yard 28 June 2021 Ulmaceae Siberian elm
Urtica gracilis [Urtica dioica subs. gracilis] YES Rich Haswell: Rio Grande Co, road to Middle San Francisco Creek trailhead 5 Sept 2021 Urticaceae California nettle, American stinging nettle
Vaccinium cespitosum [Vaccinium caespitosum] YES Nick Moore: Conejos Co, just south of Red Lake, 4 July 2023 Ericaceae dwarf bilberry
Vaccinium myrtillus [Vaccinium oreophilum] YES Rich Haswell: Rio Grande Co, on FR 332, 23 June 2020 Ericaceae bilberry, whortleberry, European blueberry
Vaccinium scoparium YES Richard Haswell: Rio Grande Co, volcanic ridge east of CR 384, 26 June 2015 Ericaceae grouse whortleberry, grouseberry, littleleaf huckleberry
Valeriana acutiloba [Valeriana capitata var. acutiloba] YES Rich Haswell: Rio Grande Co, Middle San Francisco Creek three miles from trailhead June 5 2014 Caprifoliaceae [Valerianaceae] sharpleaf valerian, downy-fruit valerian
Valeriana arizonica [Valeriana acutiloba var. ovata] [Valeriana ovata] YES Rich Haswell: Alamosa Co, Mosca Creek, in flower 22 June 2019 Caprifoliaceae [Valerianaceae] Arizona valerian
Valeriana edulis [Valeriana trachycarpa] YES Rich Haswell: Hinsdale Co, North Clear Creek Falls meadow 20 June 2017 Caprifoliaceae [Valerianaceae] tobacco root, edible valerian
Valeriana occidentalis YES Rich Haswell: Mineral Co, Tucker Ponds 23 July 2019 Caprifoliaceae [Valerianaceae] western valerian
Veratrum californicum [ Veratrum speciosum] [Veratrum tenuipetalum] YES Rich Haswell: Mineral Co, Big Meadows Res, upper end 29 May 2017 Melanthiaceae false hellebore, Western skunk cabbage, corn lily
Verbascum thapsus YES Rich Haswell: Rio Grande Co, Del Norte yard 24 July 2010; old gravel pit NE of Del Norte 26 Aug 2020 Scrophulariaceae common mullein, great mullein
Verbena bracteata [Verbena bracteosa] [Verbena confinis] [Verbena umbricata] YES Rich Haswell: Rio Grande Co, trail through foothills just S of Del Norte 19 June 2019 Verbenaceae bigbract vervain, prostrate vervain, carpet vervain
Verbena macdougalii YES Rich Haswell: Rio Grande Co, both sides of Hwy 160 at the Spanish Trail turnout between Monte Vista and Del Norte 7 May 2021 Verbenaceae hillside vervain, MacDougal's verbena
Verbesina encelioides [Ximenesia encelioides] [Ximenesia exauriculata] YES Rich Haswell: Rio Grande Co, quarry trail E of Del Norte 4 Oct 2020 Asteraceae cowpen daisy, crownbeard, ironweed
Veronica alpina [Synthyris alpina] [Besseya alpina] YES Rich Haswell: Rio Grande Co, Grayback Mountain 8 July 2019 Scrophulariaceae alpine kittentails
Veronica americana YES Rich Haswell: Rio Grande Co, Million Reservoir 28 Aug 2020 Plantaginaceae American speedwell, American brooklime
Veronica anagallis-aquatica [Veronica catenata] [Veronica micromera] YES Rich Haswell: Saguache Co, Bauchmann Creek, 10 air miles NE of South Fork 25 Sept 2019 Plantaginaceae water speedwell
Veronica peregrina [Veronica xalapensis] YES Rich Haswell: Rio Grande Co, gravel pit NE of Del Norte 21 June 2021 Plantaginaceae hairy purslane speedwell, neckweed
Veronica plantaginea [Synthyris plantaginea [Besseya plantaginea] [Besseya arizonica] YES Rich Haswell: On Carnero Creek below guard station, Carnero Pass road 3 July 2019 Scrophulariaceae White River coraldrops, white kittentail
Veronica serpyllifolia [Veronica serpyllifolia var. humifusa] [Veronicastrum serpyllifolium subsp. humifusum] YES Rich Haswell: Rio Grande Co, stream flowing north into Embargo Creek 26 July 2016 Plantaginaceae thymeleaf speedwell
Veronica wormskjoldii [Veronica nutans] YES Rich Haswell: Rio Grande Co, by beaver pond west of Crystal Lakes 14 July 2020 Plantaginaceae American alpine speedwell
Vesper constancei [Cymopterus constancei] YES Rich Haswell: Rio Grande Co, foothills just S of Del Norte, 18 May 2019 Apiaceae dusty maiden
Vexibia nuttalliana [Sophora nuttalliana] [Sophora sericea] [Vexibia sericea] YES Rich Haswell: south of Saguache (Saguache Co) by Hwy 285 June-July 2023 Fabaceae necklace pod, white loco weed, sillky sophora
Vicia americana YES Rich Haswell Mineral Co, beside Hwy 160, 10 road miles SW of South Fork 10 June 2020 Fabaceae American vetch
Viola adunca [Viola labradorica] [Viola bellidiflora] [Viola montanensis] [Viola puberulera] [Viola retroscabra] YES Rich Haswell: Mineral Co, Shaw Lake July 6 2018 Violaceae hookedspur violet, sand violet, western dog violet
Viola nephrophylla [Viola sororia] YES Rich Haswell: Mineral Co, edge of upper Tucker Pond 23 July 2019 Violaceae common blue violet
Viola palustris [Viola renifolia] [Viola macloskeyi] YES Mary E. McDonald: Conejos Co, near Cumbres pass 19 June 2022; 28 June 2023 Violaceae marsh violet
Viola rugulosa [Viola canadensis var. rugulosa] [Viola rydbergii] YES Rich Haswell: Mineral Co, Tucker Ponds 23 July 2019 Violaceae Canadian violet
Viola tricolor YES Rich Haswell: Rio Grande Co, Del Norte, between street and yard 28 May 2015 Violaceae wild pansy, Johnny-jump-up, hearts-ease
Wyethia arizonica YES Mary E. McDonald: Conejos Co, slope by Hwy 17 near Cumbres Pass 15 June 2021 Asteraceae Arizona mule's-ears
Xanthisma coloradoense [Machaeranthera coloradoensis] YES Rich Haswell: Rio Grande Co, along utility road to Grayback Mt off CR14, 21 Aug 2014 Asteraceae Colorado aster
Xanthisma spinulosum [Machaeranthera spinulosa] [Machaeranthera pinnatifida] [Amellus spinulosus] [Haplopappus spinulosus] etc. YES Rich Haswell: Rio Grande Co, Del Norte, house 17 July 2013; Rio Grande Co, base of Limekiln Peak 7 May 2021 Asteraceae tansy aster
Xanthium strumarium YES Rich Haswell: Saguache Co, Russell Lakes SWP 10 July 2016; Conejos Co, bank of the Rio Grande at Hwy 142, 28 Sept 2021 Yes Asteraceae rough cocklebur, clotbur
Yucca baileyi YES Mary E. McDonald Conejos Co, Rd 5045 near the old Martinez cemetery 28 June 2019; 3 July 2019 Asparagaceae Bailey’s yucca
Yucca glauca [Yucca angustifolia] YES Rich Haswell: Saguache Co, Biedell Creek N of La Garita 27 May 2019 Asparagaceae Great Plains yucca, soapweed
Zannichellia palustris YES Rich Haswell: Saguache Co, Russell Lakes SWA 7 Sept 2018 Zannichelliaceae horned pondweed