Taxon Details

Cirsium ciliolatum

Ashland thistle

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Taxon Summary:

Cirsium ciliolatum, commonly known as Ashland thistle, is a perennial herb in the Asteraceae that is found in California and elsewhere. It occurs within Cismontane woodland, and Valley and foothill grassland, growing at elevations from 800 to 1400 meters. Cirsium ciliolatum is ranked 2B.1, Plants Rare, Threatened, or Endangered in California, But More Common Elsewhere; Seriously threatened in California.

Classification

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

Conservation Status

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

Ecology and Life History

Lifeform: perennial herb

Blooming Period: Jun-Aug

Elevation:
800 - 1400 meters
2625 - 4595 feet

General Habitats:

Cismontane woodland
Valley and foothill grassland

Microhabitat Details:

Microhabitat:

Notes

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 Data from the CNDDB

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 Data from the CNDDB

Element Occurrence Ranks:
Total Occurrences:					6
A	B	C	D	X	U
1	1	0	0	0	4

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

Presence:
Presumed Extant	6
Possibly Extirpated	0
Presumed Extirpated	0

Location

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

Map

Presumed Extant

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CNPS Rare Plant Inventory