Marah oregana

Rarity

CNPS-EB: B-PV

13 current natural populations

Criteria:

Small Populations
Declining

Observations

CNPS-EB Database ⓘ
Calflora (group) ⓘ
Calflora (public)
iNaturalist
- Genus Marah
- Marah oregana
CCH2

Key

Ecology

Flowers March - May

Habitats:

Miscellaneous

References

Populations

Key

Location	Pop ID	Last Recorded	Notes
Brushy Peak Rgnl Park - other or unknown sites	1	2002-12-31
Concord Naval Weapons Station	21	2008-12-31
Corral Hollow Area	22	2009-03-31
Crockett	19	2005-03-21
EBMUD land near Orinda	26	2025-03-19
Flicker Ridge - EBMUD	7	2007-05-15
Gudde Ridge, Moraga	10	2022-03-22
Joaquin Miller Park, Oakland	12	2003-03-15
Port Costa	20	2023-03-17
Redwood Rgnl Park	14	2020-03-26
Sibley Rgnl Park	9	2021-05-08
Siesta Valley, Upper - EBMUD land	16	2015-03-08
Tilden Rgnl Park - San Pablo Ridge	17	2023-05-20
Black Diamond Rgnl Preserve	25	1991-03-23	ID Uncertain
Brushy Peak Rgnl Park - LARPD	2	1995-03-19	Historic
Cedar Mountain	4	1993-04-10	Historic
Del Valle Regional Park	3	1991-05-08	Historic
Garin Rgnl Park	5	1997-03-06	Historic
Grizzly Peak Blvd, Oakland	8	1997-12-31	Historic
Huckleberry Rgnl Preserve	6	1999-12-31	Historic
Joaquin Miller Park, Oakland	11	1995-05-15	Historic
Livermore Valley	23	1989-12-31	Historic
Redwood Rgnl Park	13	1994-03-13	Historic
Redwood Rgnl Park	15	1981-03-31	Historic
Strawberry Canyon	18	1979-12-31	Historic
Sycamore Grove Rgnl Park - LAPRD	24	1999-12-31	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.