Corethrogyne filaginifolia

California aster

Family:Asteraceae

Rarity

CNPS-EB: C

16 current natural populations

Observations

CNPS-EB Database ⓘ
Calflora (group) ⓘ
Calflora (public)
iNaturalist
- Genus Corethrogyne
- Corethrogyne filaginifolia
CCH2

Key

Ecology

Flowers July - November

Habitats:

Grassland (Annual or Perennial)
Scrub (Coastal or Interior)
Woodland

References

Synonyms

Corethrogyne filaginifolia var. californica
Lessingia filaginifolia var. filaginifolia

Populations

Key

Location	Pop ID	Last Recorded	Notes
Brushy Peak Rgnl Park - other or unknown sites	22	2025-07-26
Brushy Peak Rgnl Park - other or unknown sites	24	2022-03-01
Chabot Rgnl Park	1	2020-05-30
Cull Canyon Rgnl Park	2	2003-07-07
Del Valle Regional Park	21	2025-09-07
Fairmont Ridge, near Lake Chabot	3	2024-04-18
Franklin Canyon	25	2022-10-11
Livermore - other or unknown sites	20	2025-09-13
Maguire Peaks, Sunol Regional Wilderness	12	2011-08-21
Niles Canyon area	5	2022-06-17
Pleasanton Area	17	2025-07-10
Pleasanton Ridge Rgnl Park	19	2025-10-12
Pleasanton Ridge Rgnl Park	23	2025-06-19
San Francisco Water District land, Sunol	9	2004-06-07
Sycamore Grove Rgnl Park - LAPRD	15	2001-12-31
Sycamore Grove Rgnl Park - LAPRD	18	2025-07-18
Las Trampas Rgnl Wilderness	4	1999-12-31	Historic
Norris Canyon	6	1976-12-31	Historic
Palomares Road - Stoneybrook Canyon	7	1969-06-21	Historic
Patterson Pass	8	1933-07-20	Historic
San Ramon, East of 680	10	1996-12-31	Historic
San Ramon, W of 680	11	1998-12-31	Historic
Sunol - town	14	1916-12-31	Historic
Sunol Rgnl Wilderness	13	1993-05-22	Historic
Walpert Ridge	16	1998-12-31	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.