Species Details

Cirsium arizonicum var. tenuisectum

desert mountain thistle

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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:
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
Lifeform: perennial herb
Blooming Period: Jun-Nov
Elevation:
1500 - 2800 meters
4920 - 9185 feet
General Habitat:
  • Joshua tree "woodland"
  • Mojavean desert scrub
  • Pinyon and juniper woodland
General Micro Habitat:
Micro Habitat:
  • Disturbed areas
  • Roadsides (often)
  • Rocky
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:
Other:
Total Occurrences: 8
Element Occurrence Ranks:
A B C D X U
0 1 0 0 0 7
Occurrence Status:
Historical >20 Years 3
Recent <=20 Years 5
Presence:
Presumed Extant 8
Possibly Extirpated 0
Presumed Extirpated 0
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.

Map

Presumed Extant
Counties   Quads