Arnica discoidea

Rarity

CNPS-EB: B

12 current natural populations

Criteria:

S Limit
Small Populations

Observations

Key

Ecology

Flowers May - July

Habitats:

Chaparral
Forest
Woodland

References

Synonyms

Arnica discoidea var. alata
Arnica discoidea var. eradiata

Populations

Key

Location	Pop ID	Last Recorded	Notes
Briones Reservoir, EBMUD	2	2005-05-31
Briones Reservoir, EBMUD	25	2018-05-16
Briones Reservoir, EBMUD	26	2022-05-02
Flicker Ridge - EBMUD	12	2007-05-15
Huckleberry Rgnl Preserve	14	2022-04-30
Kennedy Grove Rgnl Park	15	2012-03-17
Mt. Diablo State Park - South side	6	2022-04-20
Mt. Diablo State Park - South side	7	2018-06-13
Mt. Diablo State Park - Summit and Upper area - 2500 ft and abo	10	2021-05-06
Mt. Diablo State Park - Summit and Upper area - 2500 ft and abo	11	2019-06-10
Redwood Rgnl Park	19	2023-07-02
Redwood Rgnl Park	24	2022-06-20
Black Diamond Rgnl Preserve	1	1995-03-04	Historic
Canyon Area - EBMUD land nearby	5	1998-08-18	Historic
Claremont Canyon Rgnl Park	4	1992-04-11	Historic
EBMUD land near Orinda	13	1999-12-31	Historic
Los Mochos Boy Scout Camp, Mines Rd	16	1996-12-31	Historic
Mt. Diablo State Park - South side	8	1933-05-22	Historic
Redwood Rgnl Park	18	1990-12-31	Historic
San Leandro Reservoir - EBMUD	17	1993-12-31	Historic
Sibley Rgnl Park	3	1993-12-31	Historic
Siesta Valley, Upper - EBMUD land	20	1993-12-31	Historic
Strawberry Canyon	21	1935-05-24	Historic
Tilden Rgnl Park - Jewel Lake/Nature area	22	1994-07-11	Historic
Tilden Rgnl Park - Wildcat Gorge	23	1990-12-31	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.