Single Record
Participant Info
- Species
- Oenothera albicaulis [Anogra albicaulis] [Oenothera ctenophylla]
- Family
- Onagraceae
- CommonName
- whitestem evening primrose
- Presence
- Yes
- Status
- native
- EarliestDate
- 1912
- LatestDate
- 2017
- Ecosystem
- basin, foothill, ruderal, sanddunes
- Geobotanical
- SSawatch, SSanjuans, Culebras, NCristos, UBasin
- Counties
- Alamosa, Conejos, Costilla, Rio Grande, Saguache
- Passes
- WildlifePreserves
- Dry Creek, Great Sand Dunes, Hot Creek, San Luis Lakes
- Other Localities
- La Botica
- Comments
- On both sides of the Valley, white-stemmed evening primrose prefers sandy soil and open terrain. Occasionally it takes advantage of disturbed ground, for instance beside gravel roads. The one Basin location (2014, 2017) is from the low, stabilized sand dunes of Mosca campground north of Alamosa, close to the shore of San Luis Lake. It is a Rocky Mountains and desert Southwest plant that follows the Rio Grande drainage one county past the Big Bend of Texas. Note that in the Watershed, O. albicaulis can be mistaken for O. pallida subsp. trichocalyx. The surest way to distinguish them is by their capsules (seedpods). That of O. albicaulis is less hairy and four-angled in cross section. That of O. pallida subsp. trichocalyx is covered with long hairs and round in cross section. Incidentally, the voucher determined as "Oenothera engelmannii" by S. Stecher from near San Luis Lake (1988, Alamosa Co) is probably O. albicaulis.
- Annotation