Species Details

Arctostaphylos confertiflora

Santa Rosa Island manzanita

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Classification

Scientific Name: Arctostaphylos confertiflora Eastw.
Common Name: Santa Rosa Island manzanita
Family:	Ericaceae
Element Code:	PDERI040A0
USDA Plants Symbol:	ARCO13
Synonyms/Other Names:

Conservation Status

CA Rare Plant Rank:	1B.2
Fed List:	FE (1997-07-31)
State List:	None
Global Rank:	G2
State Rank:	S2
Other Status:	SB_CalBG/RSABG; SB_SBBG; SB_USDA
CRPR Changes:
Add Date:	1974-01-01
Date Edited:	2022-02-01

Ecology and Life History

Lifeform: perennial evergreen shrub

Blooming Period: Feb-Apr

Elevation:
40 - 500 meters
130 - 1640 feet

General Habitats:

Broadleafed upland forest
Closed-cone coniferous forest
Chaparral

Microhabitat Details:

Microhabitat:

Rocky
Sandstone

Notes

Notes: Fewer than 400 plants were estimated to occur as of 1996. Threatened by cattle grazing and feral herbivores. See Leaflets of Western Botany 1:122 (1934) for original description.
Threats:
Taxonomy:

Threat List Data from the CNDDB

THREAT LIST:
Threat List Total:	1
	Total EOs	% of EOs
EOs with Threat Listed:	4	100 %
Erosion/runoff	4	100%

Occurrence Data from the CNDDB

Element Occurrence Ranks:
Total Occurrences:					4
A	B	C	D	X	U
0	0	0	0	0	4

Occurrence Status:
Historical >20 Years	0
Recent <=20 Years	4

Presence:
Presumed Extant	4
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 Rosa Island East (3311988), Santa Rosa Island North (3312081), Santa Rosa Island South (3312071)

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

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

CNPS Rare Plant Inventory