Species Details

Arctostaphylos manzanita ssp. laevigata

Contra Costa manzanita

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Photo of Arctostaphylos manzanita ssp. laevigata

Species Description:

Arctostaphylos manzanita ssp. laevigata, commonly known as Contra Costa manzanita, is a perennial evergreen shrub in the Ericaceae that is found only in California. It occurs within Chaparral, growing at elevations from 430 to 1100 meters. Arctostaphylos manzanita ssp. laevigata is ranked 1B.2, Plants Rare, Threatened or Endangered in California and Elsewhere; Moderately threatened in California.

Classification

Scientific Name: Arctostaphylos manzanita Parry ssp. laevigata (Eastw.) Munz
Common Name: Contra Costa manzanita
Family:	Ericaceae
Element Code:	PDERI04273
USDA Plants Symbol:	ARMAL
Synonyms/Other Names: Arctostaphylos pungens HBK. ssp. laevigata (Eastw.) Roof
Name Status:	JEP, FNA, POWO, IPNI, Tropicos

Conservation Status

CA Rare Plant Rank:	1B.2
Fed List:	None
State List:	None
Global Rank:	G5T2
State Rank:	S2
Other Status:	SB_UCSC
CRPR Changes:
Add Date:	1984-01-01
Date Edited:	2023-01-13

Ecology and Life History

Lifeform: perennial evergreen shrub

Blooming Period: Jan-Mar(Apr)

Elevation:
430 - 1100 meters
1410 - 3610 feet

General Habitats:

Chaparral (rocky)

Microhabitat Details:

Microhabitat:

Notes

Notes: Threatened by road maintenance. Possibly threatened by fire suppression. See Leaflets of Western Botany 1:76 (1933) for original description, and Aliso 4(1):95 (1954) for revised nomenclature.
Threats:
Taxonomy:

Threat List Data from the CNDDB

THREAT LIST:
Threat List Total:	6
	Total EOs	% of EOs
EOs with Threat Listed:	5	50 %
Improper burning regime	3	30%
Other	2	20%
Road/trail construction/maint.	2	20%
Wood cutting or brush clearing	2	20%
Recreational use (non-ORV)	1	10%
Biocides	1	10%

Occurrence Data from the CNDDB

Element Occurrence Ranks:
Total Occurrences:					10
A	B	C	D	X	U
0	1	1	0	0	8

Occurrence Status:
Historical >20 Years	8
Recent <=20 Years	2

Presence:
Presumed Extant	10
Possibly Extirpated	0
Presumed Extirpated	0

Location

California Endemic:

California Island:

States: Name (Code)
California (CA)

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

Quads: Name (Quad Code)
Byron Hot Springs (3712176), 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

Map

Presumed Extant

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CNPS Rare Plant Inventory