CNPS Inventory Plant Detail

Arctostaphylos confertiflora

Common Name:	Santa Rosa Island manzanita
Family:	Ericaceae
Synonyms:
Element Code:	PDERI040A0
Full Name:	Arctostaphylos confertiflora Eastw.
USDA PLANTS Symbol:	ARCO13

Biology
Lifeform: perennial evergreen shrub Blooming Period: February - April Habitat: sandstone, rocky. • Broadleafed upland forest • Closed-cone coniferous forest • Chaparral

Rarity Status
CA Rare Plant Rank: 1B.2 Rare, threatened, or endangered in California and elsewhere .2: Fairly endangered in California Federal Listing Status: FE Endangered (07/31/97) State Listing Status: Not Listed State Rank: S1 S1: Critically Imperiled. Global Rank: G1 G1: Critically Imperiled.

Occurrence Data from DFG
California Natural Diversity Database

Total # of Known Element Occurrences: 4
Element Occurrence Ranks:

A B C D X U

0 0 0 0 0 4

Population Status:

Historic >20 yrs	Recent <=20 yrs
0	4

Presence:

Present Extant	Possibly Extirpated	Extirpated
4	0	0

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. To submit rare plant observation data, use the CNDDB field survey form. Please see also the CNPS Rare Plant Data page. Date Added: 1974-01-01 Last Update: 2010-03-15

Location

Elevation: 60 - 500 meters

California Endemic: yes

States: California

California Counties and Islands: name (code)
Santa Rosa Island (SRO)

Quads: name (DWR code) USGS code
Santa Rosa Island East (SROE) 33119H8, Santa Rosa Island North (SRON) 33120H1, Santa Rosa Island South (SROS) 33120G1

Notes:

Definitions of codes preceding a county and/or quad:
*		Presumed extirpated
?		Uncertain about distribution or identity
?*		Uncertain about distribution, but presumed extirpated if once present
(?)		Occurrence confirmed, but possibly extirpated

Species may be present in other areas where conditions are favorable.

Presumed Extant

Presumed Extirpated or Unknown

Links to Leading Resources of Taxon Information
USDA PLANTS Calflora CalPhotos Consortium of California Herbaria California Department of Fish and Game: CNDDB Quick Viewer

Suggested Citation
California Native Plant Society (CNPS). Inventory of Rare and Endangered Plants (online edition, v8-01a). California Native Plant Society. Sacramento, CA. Accessed on .

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