CNPS Inventory Plant Detail

Arctostaphylos rudis

Common Name:	sand mesa manzanita
Family:	Ericaceae
Synonyms:
Element Code:	PDERI041E0
Full Name:	Arctostaphylos rudis Jeps. & Wies.
USDA PLANTS Symbol:	ARRU2

Biology
Lifeform: perennial evergreen shrub Blooming Period: November - February Habitat: sandy. • Chaparral (maritime) • Coastal scrub

Rarity Status
CA Rare Plant Rank: 1B.2 Rare, threatened, or endangered in California and elsewhere .2: Fairly endangered in California Federal Listing Status: Not Listed State Listing Status: Not Listed State Rank: S2.2 S2: Imperiled. .2: Threatened. Global Rank: G2 G2: Imperiled.

Occurrence Data from DFG
California Natural Diversity Database

Total # of Known Element Occurrences: 22
Element Occurrence Ranks:

A B C D X U

4 7 1 1 3 6

Population Status:

Historic >20 yrs	Recent <=20 yrs
21	1

Presence:

Present Extant	Possibly Extirpated	Extirpated
19	0	3

Notes

Severely reduced on Nipomo Mesa; more widespread on Burton Mesa. Threatened by agriculture, road construction, road maintenance, and oil extraction. Possibly threatened by development. See Erythea 8:100 (1938) 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: 1980-01-01
Last Update: 2011-10-17

Location

Elevation: 25 - 322 meters

California Endemic: yes

States: California

California Counties and Islands: name (code)
Santa Barbara (SBA), San Luis Obispo (SLO)

Quads: name (DWR code) USGS code
Point Conception (145B) 34120D4, Los Alamos (170A) 34120F3, Lompoc (170B) 34120F4, Lompoc Hills (170C) 34120E4, Surf (171A) 34120F5, Point Arguello (171C) 34120E6, Tranquillon Mtn. (171D) 34120E5, Santa Maria (195B) 34120H4, Orcutt (195C) 34120G4, Guadalupe (196A) 34120H5, Point Sal (196B) 34120H6, Casmalia (196D) 34120G5, Nipomo (220C) 35120A4, Oceano (221D) 35120A5

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 .

-120.5,34.75