CNPS

CNPS Rare Plant Inventory

Species Details

Cirsium arizonicum var. tenuisectum

desert mountain thistle

  Download Report   Calflora    eFlora    CCH    CalPhotos  
No Photo Available

  Classification

Scientific Name:
Cirsium arizonicum (A. Gray) Petrak var. tenuisectum Keil
Common Name:
desert mountain thistle
Family: Asteraceae
Element Code: PDAST2E083
USDA Plants Symbol:
Synonyms/Other Names:

  Conservation Status

CA Rare Plant Rank: 1B.2
Fed List: None
State List: None
Global Rank: G5T2
State Rank:
 S2
Other Status: SB_CalBG/RSABG
CRPR Changes:
added to 1B.2 on 2006-12-27
Add Date: 2006-12-27
Date Edited: 2021-11-05

  Ecology and Life History

Lifeform: perennial herb
Blooming Period: Jun-Nov
JFMAMJJASOND
Elevation:
1500 - 2800 meters
4920 - 9185 feet
General Habitats:
  • Joshua tree "woodland"
  • Mojavean desert scrub
  • Pinyon and juniper woodland
Microhabitat Details:
Microhabitat:
  • Disturbed areas
  • Roadsides (often)
  • Rocky

  Notes

Notes:
Known in CA only from the New York Mountains of San Bernardino County. The name Cirsium nidulum has long been misapplied to this species. May be distinctive enough to be its own taxon and not a variety of Cirsium arizonicum. See SIDA 21(1): 210 (2004) for original description.
Threats:
Taxonomy:

  Threat List Data from the CNDDB

Threat List Total: 2
Total EOs % of EOs
EOs with Threat Listed: 2 25 %
THREAT LIST:
Other 1 12%
Recreational use (non-ORV) 1 12%

  Occurrence Data from the CNDDB

Total Occurrences: 8
Element Occurrence Ranks:
A B C D X U
0 1 0 0 0 7
Occurrence Status:
Historical >20 Years 4
Recent <=20 Years 4
Presence:
Presumed Extant 8
Possibly Extirpated 0
Presumed Extirpated 0

  Location

California Endemic:
California Island:
States: Name (Code)
California (CA), Nevada (NV)
California Counties and Islands: Name (Code)
San Bernardino (SBD)
Quads: Name (Quad Code)
Clark Mtn. (3511555), Ivanpah (3511533), Pinto Valley (3511523)
Notes:
Definitions of codes following a county and/or quad:
* Presumed extirpated
(?) Occurrence confirmed, but possibly extirpated
Quad and county data is imported from the CNDDB. Species may be present in other areas where conditions are favorable. These data should NOT be substituted for pre-project review or for on-site surveys.
Regional Map

  Map

Presumed Extant
Click on quad for name. Hold Shift Key to use mouse scroll wheel

  Selected References

CNPS Status Review: CRPR List Addition on 2006-12-27
Suggested Citation:
California Native Plant Society, Rare Plant Program. 2024. Rare Plant Inventory (online edition, v9.5). Website https://www.rareplants.cnps.org [accessed 21 November 2024].