Species Details

Arctostaphylos pallida

pallid manzanita

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Scientific Name:
Arctostaphylos pallida Eastw.
Common Name:
pallid manzanita
Family: Ericaceae
Element Code: PDERI04110
USDA Plants Symbol: ARPA21
Synonyms/Other Names:
CA Rare Plant Rank: 1B.1
Fed List: FT (1998-04-22)
State List: CE (1979-11-01)
Global Rank: G1
State Rank:
S1
Other Status: SB_CalBG/RSABG
CRPR Changes:
Add Date: 1974-01-01
Date Edited: 2022-12-06
Lifeform: perennial evergreen shrub
Blooming Period: Dec-Mar
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Elevation:
185 - 465 meters
605 - 1525 feet
General Habitats:
  • Broadleafed upland forest
  • Closed-cone coniferous forest
  • Chaparral
  • Cismontane woodland
  • Coastal scrub
Microhabitat Details: siliceous shale
Microhabitat:
  • Gravelly (sometimes)
  • Sandy (sometimes)
Notes:
Known from fewer than 10 occurrences in the Contra Costa Hills of the Diablo Range. Threatened by alteration of fire regimes, non-native plants, and road construction, and possibly by development, fungal infection, and hybridization. Plants from 465B are introduced. See Leaflets of Western Botany 1:76 (1933) for original description, and Four Seasons 7(4):28-46 (1987) for ecological assessment.
Threats:
Taxonomy:
Threat List Total: 14
Total EOs % of EOs
EOs with Threat Listed: 9 100 %
THREAT LIST:
Other 8 88%
Road/trail construction/maint. 4 44%
Improper burning regime 3 33%
Non-native plant impacts 3 33%
Development 3 33%
Total Occurrences: 9
Element Occurrence Ranks:
A B C D X U
0 1 4 3 1 0
Occurrence Status:
Historical >20 Years 1
Recent <=20 Years 8
Presence:
Presumed Extant 8
Possibly Extirpated 1
Presumed Extirpated 0
California Endemic:
California Island:
States: Name (Code)
California (CA)
California Counties and Islands: Name (Code)
Alameda (ALA), Contra Costa (CCA)
Quads: Name (Quad Code)
Briones Valley (3712282), Oakland East (3712272), Richmond (3712283)
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.
Presumed Extant
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