CNPS Inventory Plant Detail

Cirsium occidentale var. compactum

Common Name:	compact cobwebby thistle
Family:	Asteraceae
Synonyms:
Element Code:	PDAST2E1Z1
Full Name:	Cirsium occidentale (Nutt.) Jeps. var. compactum Hoov.
USDA PLANTS Symbol:	CIOCC2

Biology
Lifeform: perennial herb Blooming Period: April - June Habitat: • Chaparral • Coastal dunes • Coastal prairie • Coastal scrub

Rarity Status

CA Rare Plant Rank: 1B.2
Rare, threatened, or endangered in California and elsewhere
.2: Fairly endangered in California
Federal Listing Status:
Not Listed
State Listing Status:
Not Listed
State Rank: S2.1
S2: Imperiled.
.1: Very threatened.
Global Rank: G3G4T2
T2: Imperiled. G3: (species) Vulnerable. G4: (species) Apparently secure, considering populations outside California.

Occurrence Data from DFG
California Natural Diversity Database

Total # of Known Element Occurrences: 14
Element Occurrence Ranks:

A B C D X U

0 2 3 1 1 7

Population Status:

Historic >20 yrs	Recent <=20 yrs
9	5

Presence:

Present Extant	Possibly Extirpated	Extirpated
13	1	0

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.
To submit rare plant observation data, use the CNDDB field survey form. Please see also the CNPS Rare Plant Data page.
Date Added: 1974-01-01
Last Update: 2010-03-15

Location

Elevation: 5 - 150 meters

California Endemic: yes

States: California

California Counties and Islands: name (code)
Monterey (MNT) ?, San Francisco (SFO) *, San Luis Obispo (SLO)

Quads: name (DWR code) USGS code
Cayucos (247B) 35120D8, San Simeon (271B) 35121F2, Pico Creek (271C) 35121E2, Cambria (271D) 35121E1, Piedras Blancas (272A) 35121F3, Point Sur (344C)? 36121C8, San Francisco South (448B)* 37122F4

Notes:

Definitions of codes preceding a county and/or quad:
*		Presumed extirpated
?		Uncertain about distribution or identity
?*		Uncertain about distribution, but presumed extirpated if once present
(?)		Occurrence confirmed, but possibly extirpated

Species may be present in other areas where conditions are favorable.

Presumed Extant

Presumed Extirpated or Unknown

488

Links to Leading Resources of Taxon Information
USDA PLANTS Calflora CalPhotos Consortium of California Herbaria California Department of Fish and Game: CNDDB Quick Viewer

Suggested Citation
California Native Plant Society (CNPS). Inventory of Rare and Endangered Plants (online edition, v8-01a). California Native Plant Society. Sacramento, CA. Accessed on .

-121.25,35.625