Cirsium ciliolatum

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Scientific Name: Cirsium ciliolatum (Henders.) J.T. Howell
Common Name: Ashland thistle
Family:	Asteraceae
Element Code:	PDAST2E0P0
USDA Plants Symbol:	CICI
Synonyms/Other Names:

CA Rare Plant Rank:	2B.1
Fed List:	None
State List:	CE (1982-09-01)
Global Rank:	G3
State Rank:	S1
Other Status:	BLM_S
CRPR Changes: changed from 2.1 to 2B.1 on 2006-07-14
Add Date:	1980-01-01
Date Edited:	2024-11-05

Lifeform: perennial herb

Blooming Period: Jun-Aug

Elevation:
800 - 1400 meters
2625 - 4595 feet

General Habitats:

Microhabitat Details:

Microhabitat:

Notes: Known in CA from fewer than ten occurrences. Threatened by agriculture and road maintenance. Possibly threatened by grazing. On review list in OR. See Bulletin of the Torrey Botanical Club 27:348 (1900) for original description.
Threats:
Taxonomy:

THREAT LIST:
Threat List Total:	5
	Total EOs	% of EOs
EOs with Threat Listed:	3	50 %
Road/trail construction/maint.	2	33%
Biocides	1	16%
Grazing	1	16%
Non-native plant impacts	1	16%
Other	1	16%

Occurrence Status:
Historical >20 Years	5
Recent <=20 Years	1

California Endemic:

California Island:

States: Name (Code)
California (CA), Oregon (OR)

California Counties and Islands: Name (Code)
Siskiyou (SIS)

Quads: Name (Quad Code)
Bogus Mountain (4112274), Dewey Gulch (4112273)

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

Presumed Extant

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CNPS Rare Plant Inventory