Species Details

Cirsium occidentale var. compactum

compact cobwebby thistle

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Scientific Name:
Cirsium occidentale (Nutt.) Jeps. var. compactum Hoov.
Common Name:
compact cobwebby thistle
Family: Asteraceae
Element Code: PDAST2E1Z1
USDA Plants Symbol: CIOCC2
Synonyms/Other Names:
Lifeform: perennial herb
Blooming Period: Apr-Jun
Elevation:
5 - 150 meters
15 - 490 feet
General Habitat:
  • Chaparral
  • Coastal dunes
  • Coastal prairie
  • Coastal scrub
General Micro Habitat:
Micro Habitat:
Notes:
Known from fewer than twenty occurrences. Threatened by grazing and insect predation, and potentially by road construction and development. Some inland plants weakly separated from var. occidentale. Compact, low-growing plants from MNT Co. (344C) are probably not var. compactum.
Threats:
Taxonomy:
Other:
Total Occurrences: 30
Element Occurrence Ranks:
A B C D X U
1 3 3 1 1 21
Occurrence Status:
Historical >20 Years 22
Recent <=20 Years 8
Presence:
Presumed Extant 29
Possibly Extirpated 1
Presumed Extirpated 0
California Endemic:
California Island:
States: Name (Code)
California (CA)
California Counties and Islands: Name (Code)
Los Angeles (LAX), Monterey (MNT)?, San Francisco (SFO)*, San Luis Obispo (SLO), San Mateo (SMT), Santa Barbara (SBA)
Quads: Name (Quad Code)
Big Sur (3612137), Cambria (3512151), Cayucos (3512048), Pfeiffer Point (3612127), Pico Creek (3512152), Piedras Blancas (3512163), Point Sal (3412086), Point Sur (3612138)?, San Francisco South (3712264)*, San Miguel Island East (3312083), San Miguel Island West (3312084), San Simeon (3512162), Santa Catalina East (3311833), Santa Rosa Island North (3312081), Santa Rosa Island South (3312071), Santa Rosa Island West (3312082)
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