Single Record
Participant Info
- Species
- Cirsium americanum [Cirsium scariosum var. americanum] [Cirsium tioganum] [Cirsium acaulescens] [Cirsium coloradense subsp. acaulescens] [Cirsium drummondii var. acaulescens]
- Family
- Asteraceae
- CommonName
- meadow thistle, stemless thistle, dinnerplate thistle
- Presence
- YES
- Status
- native
- EarliestDate
- 1911
- LatestDate
- 2017
- Ecosystem
- montane, subalpine
- Geobotanical
- Garitas, SSanjuans
- Counties
- Conejos, Costilla, Hinsdale, Mineral, Rio Grande, Saguache
- Passes
- WildlifePreserves
- Other Localities
- Comments
- Cirsium americanum var. scariosum used to be treated as the acaulescent (stemless) form of C. scariosum, sometimes named C. tioganum (see Ackerfield 2016). Ackerfield 2022 now treats it as C. americanum, and the caulescent form as C. coloradense (see Ackerfields 's dissertation A Prickly Puzzle, 2020). C. americanm has been recorded fairly often from forest edge and meadowy habitats in the montane and subalpine of the Watershed, from the west side of the Valley but not, judging from SEINet records, from the east side. Again judging from SEINet, as well as FNA, the USA distribution is all states W of the Great Plains except for Washington, Montana, Arizona, and New Mexico. The Watershed locations may be the only ones in the entire Rio Grande drainage.
- Annotation