Taxon Details

Arctostaphylos viridissima

white-haired manzanita

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Taxon Summary:

Arctostaphylos viridissima, commonly known as white-haired manzanita, is a perennial evergreen shrub in the Ericaceae that is found only in California. It occurs within Chaparral, and Closed-cone coniferous forest, growing at elevations from 100 to 500 meters. Arctostaphylos viridissima is ranked 4.2, Plants of Limited Distribution, A Watch List; Moderately threatened in California.

Classification

Scientific Name: Arctostaphylos viridissima (Eastw.) McMinn
Common Name: white-haired manzanita
Family:	Ericaceae
Element Code:	PDERI041L0
USDA Plants Symbol:	ARVI7
Synonyms/Other Names:
Name Status:	JEF, FNA, POWO, IPNI, Tropicos

Conservation Status

CA Rare Plant Rank:	4.2
Fed List:	None
State List:	None
Global Rank:	G4
State Rank:	S4
Other Status:	SB_SBBG
CRPR Changes:
Add Date:	1980-01-01
Date Edited:	2025-10-29

Ecology and Life History

Lifeform: perennial evergreen shrub

Blooming Period: May-Mar

Elevation:
100 - 500 meters
330 - 1640 feet

General Habitats:

Closed-cone coniferous forest
Chaparral

Microhabitat Details:

Microhabitat:

Rocky
Shale (usually)

Notes

Notes: Mainland occurrences of A. viridissima may be erroneous. See Leaflets of Western Botany 1:62 (1933) for original description, and Illustrated Manual of California Shrubs, p. 419 (1939) by H. McMinn for revised nomenclature.
Threats: Possibly threatened by feral herbivores.
Taxonomy:

Threat List Data from the CNDDB

THREAT LIST:
Threat List Total:	0
	Total EOs	% of EOs
EOs with Threat Listed:	0	0 %

Occurrence Data from the CNDDB

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

Occurrence Status:
Historical >20 Years	0
Recent <=20 Years	0

Presence:
Presumed Extant	0
Possibly Extirpated	0
Presumed Extirpated	0

Location

California Endemic:

California Island:

States: Name (Code)
California (CA)

California Counties and Islands: Name (Code)
Santa Barbara (SBA)

Quads: Name (Quad Code)
Santa Cruz Island B (3311986), Santa Cruz Island C (3311985), Santa Cruz Island D (3311984)

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