Ranunculus occidentalis var. occidentalis

western buttercup

Family:Ranunculaceae

Rarity

CNPS-EB: B

7 current natural populations

Criteria:

Narrow Range in ALA & CCA

Observations

Key

Ecology

Flowers March - July

Habitats:

Grassland (Annual or Perennial)
Woodland

All Ranunculus

R. canus var. canus (C)
R. lobbii (*A2)
R. occidentalis var. occidentalis
R. orthorhynchus var. bloomeri (A1x)
R. orthorhynchus var. orthorhynchus (A1x)

References

Synonyms

Ranunculus occidentalis var. eisenii
Ranunculus occidentalis var. rattanii

Populations

Key

Location	Pop ID	Last Recorded	Notes
Black Diamond - Sommersville	1	2001-03-23
Concord Naval Weapons Station	3	2008-12-31
Diablo Foothills Rgnl Park	4	2003-03-10
Lime Ridge area	6	2001-03-24
Mt. Diablo State Park - North side	5	2003-03-21
Mt. Diablo State Park - West side	11	2013-04-19
Shell Ridge	10	2025-02-22
Contra Loma Rgnl Park	2	1993-03-14	Historic
Las Trampas Rgnl Wilderness	7	1993-03-21	ID Uncertain
Los Vaqueros Watershed	8	1988-12-31	Historic
Morgan Territory Rgnl Park	9	1994-05-07	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.