Cirsium brevistylum

indian thistle

Family:Asteraceae

Rarity

CNPS-EB: B

10 current natural populations

Criteria:

Narrow Range in ALA & CCA
Small Populations

Observations

CNPS-EB Database ⓘ
Calflora (group) ⓘ
Calflora (public)
iNaturalist
- Genus Cirsium
- Cirsium brevistylum
CCH2

Key

Ecology

Flowers March - August

Habitats:

Miscellaneous

All Cirsium

References

Populations

Key

Location	Pop ID	Last Recorded	Notes
Canyon Area - EBMUD land nearby	10	2006-06-05
Chabot - Garin Trail - North of Cull Canyon	2	2003-07-07
Chabot Rgnl Park	4	2021-05-23
Claremont Canyon Rgnl Park	5	2022-05-31
Huckleberry Rgnl Preserve	13	2021-05-16
Redwood Rgnl Park	15	2004-06-13
Redwood Rgnl Park	20	2021-06-26
Siesta Valley, Upper - EBMUD land	7	2017-05-22
Siesta Valley, Upper - EBMUD land	21	2024-07-19
Wildcat Rgnl Park	9	2009-12-31
Albany Hill	19	1995-06-03	Historic
Briones Reservoir, EBMUD	1	1997-03-31	ID Uncertain
Canyon Area - EBMUD land nearby	11	1998-06-24	Historic
Chabot Rgnl Park	3	1997-07-11	Historic
Claremont Canyon Rgnl Park	6	1995-12-31	Historic
Del Valle Regional Park	18	1999-12-31	Historic
Flicker Ridge - EBMUD	12	1980-12-31	Historic
Franklin Ridge	16	1999-04-30	Historic
Niles Canyon area	17	1897-06-20	Historic
Sibley Rgnl Park	14	1996-12-31	Historic
Strawberry Canyon	8	1997-10-02	Historic

The list of populations shows the distinct populations identified by the CNPS-EB Rare and Unusual Plants Committee. The locations in this list are very general. More specific location details can be obtained from the links in the Observations section (for some of these links, a login is required).

Font

Populations in bold type have precise coordinates available for field volunteers and researchers.

Populations in normal type are only known from a description of the location; no precise coordinates are available.

Background

Populations with a white background have been observed in the last 25 years.

Populations with a blue background have not been observed for at least 25 years.

Populations with an orange background have an uncertain location or identification, or are planted.

Columns

Pop ID is a label that identifies the population. Many locations have more than one population of a species, and the population ID is used to distinguish them.