Arctostaphylos auriculata

Download Report Calflora eFlora CCH CalPhotos

Scientific Name: Arctostaphylos auriculata Eastw.
Common Name: Mt. Diablo manzanita
Family:	Ericaceae
Element Code:	PDERI04040
USDA Plants Symbol:	ARAU
Synonyms/Other Names:

Lifeform: perennial evergreen shrub

Blooming Period: Jan-Mar

Elevation:
135 - 650 meters
445 - 2135 feet

General Habitats:

Microhabitat Details:

Microhabitat:

Notes: Known from fewer than twenty occurrences. Threatened by road maintenance. See Bulletin of the Torrey Botanical Club 32:202 (1905) for original description, and American Midland Naturalist 23:622 (1940) for taxonomic treatment.
Threats:
Taxonomy:

THREAT LIST:
Threat List Total:	10
	Total EOs	% of EOs
EOs with Threat Listed:	10	59 %
Improper burning regime	6	35%
Recreational use (non-ORV)	6	35%
Road/trail construction/maint.	6	35%
Grazing	5	29%
Other	4	23%
Development	2	11%
Biocides	1	5%
ORV activity	1	5%
Vandalism/dumping/litter	1	5%
Wood cutting or brush clearing	1	5%

Occurrence Status:
Historical >20 Years	13
Recent <=20 Years	4

California Endemic:

California Island:

States: Name (Code)
California (CA)

California Counties and Islands: Name (Code)
Contra Costa (CCA)

Quads: Name (Quad Code)
Antioch South (3712187), Clayton (3712188), Diablo (3712178), Tassajara (3712177)

Notes:

Definitions of codes following a county and/or quad:
*		Presumed extirpated
(?)		Occurrence confirmed, but possibly extirpated
Quad and county data is imported from the CNDDB. Species may be present in other areas where conditions are favorable. These data should NOT be substituted for pre-project review or for on-site surveys.

Regional Map

Presumed Extant

Click on quad for name. Hold Shift Key to use mouse scroll wheel

CNPS Rare Plant Inventory