Arctostaphylos auriculata

Mount Diablo manzanita

Family:Ericaceae

Rarity

CNPS-EB: *A2
State CNPS: 1B.3
Global Rank: G2
CNDDB Rank: S2

12 current natural populations

Criteria:

Small Geographical Range

Observations

CNPS-EB Database ⓘ
Calflora (group) ⓘ
Calflora (public)
iNaturalist
- Genus Arctostaphylos
- Arctostaphylos auriculata
CCH2

Key

Ecology

Flowers February - March

Habitats:

Chaparral
Sand, Sandstone

All Arctostaphylos

References

Synonyms

Arctostaphylos andersonii var. auriculata

Populations

Key

Location	Pop ID	Last Recorded	Notes
Black Diamond - Markley Canyon	1	2020-12-08
Black Diamond - Markley Canyon	2	2020-12-08
Black Diamond Rgnl Preserve	3	2022-12-31
Lime Ridge area	6	2008-05-16
Los Vaqueros Watershed	14	2012-02-28
Mt. Diablo State Park - South side	7	2023-04-19
Mt. Diablo State Park - South side	8	2005-06-29
Mt. Diablo State Park - South side	9	2010-06-02
Mt. Diablo State Park - South side	10	2025-01-07
Mt. Diablo State Park - South side	13	2022-04-02
Mt. Diablo State Park - South side	17	2022-04-02
Sand Creek	5	2002-12-31
Clayton Ranch - SE of Clayton, EBRPD	4	1998-12-31	Historic
Morgan Territory Rgnl Park	15	1996-12-31	Historic
Mt. Diablo State Park - South side	11	1932-09-05	Historic
Mt. Diablo State Park - South side	12	1999-12-31	Historic
Mt. Diablo State Park - South side	16	1996-02-12	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.