Erigeron philadelphicus var. philadelphicus

Rarity

CNPS-EB: C

16 current natural populations

Criteria:

Limited/Threatened Habitat

Observations

Key

Ecology

Habitats:

Riparian

All Erigeron

E. petrophilus var. petrophilus (B)
E. philadelphicus var. philadelphicus
E. reductus var. angustatus (A1)

References

Populations

Key

Location	Pop ID	Last Recorded	Notes
Chabot - Garin Trail - North of Cull Canyon	5	2003-06-13
Crockett	32	2004-04-30
Del Valle Regional Park	31	2026-04-29
Diablo Foothills Rgnl Park	6	2025-05-03
Gateway area	13	2023-06-25
Mt. Diablo State Park - East side	33	2026-05-29
Norris Canyon	20	2020-05-09
San Francisco Water District land, Sunol	24	2009-12-31
San Pablo Ridge, Orinda	22	2019-04-27
Siesta Valley, Lower - EBMUD land	23	2025-05-07
Sunol Rgnl Wilderness	26	2022-05-01
Sunol Rgnl Wilderness	27	2022-05-01
Sunol Rgnl Wilderness	28	2025-07-21
Sunol Rgnl Wilderness	29	2020-05-20
Wildcat Rgnl Park	3	2022-03-29
Wildcat Rgnl Park	4	2026-03-16
Alameda Creek - Sunol Valley section, SFWD	1	2000-12-31	Historic
Antioch - other or unknown sites	2	1892-12-31	Historic
Don Castro Reservoir	11	2001-05-22	Historic
Garin Rgnl Park	12	1991-05-24	Historic
Las Trampas Creek, Lafayette	14	1993-12-31	Historic
Los Vaqueros Watershed	15	1988-12-31	Historic
Marsh Creek Road	17	1938-12-31	Historic
Mission Peak Rgnl Park	18	1993-04-24	Historic
Morgan Territory Rgnl Park	16	1992-05-14	Historic
Mt. Diablo State Park - East side	8	1933-12-31	Historic
Mt. Diablo State Park - North side	9	1935-12-31	Historic
Mt. Diablo State Park - South side	10	2000-12-31	Historic
Mt. Diablo State Park - West side	7	1999-12-31	Historic
Niles Canyon area	19	1970-12-31	Historic
San Leandro Reservoir - EBMUD	21	1999-12-31	Historic
Sunol Rgnl Wilderness	25	1970-04-14	Historic
Walpert Ridge	30	1997-05-31	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.