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Arctostaphylos pilosula
Common Name: Santa Margarita manzanita
Family: Ericaceae
Synonyms: Arctostaphylos pilosula ssp. pilosula, Arctostaphylos wellsii
Element Code: PDERI042Z0
Full Name: Arctostaphylos pilosula Jeps. & Wies.

1984 California Native Plant Society
Biology Glossary
  • Lifeform: perennial evergreen shrub
  • Blooming Period: Dec-May
  • Habitat: Sometimes sandstone..
    • Broadleafed upland forest
    • Closed-cone coniferous forest
    • Chaparral
    • Cismontane woodland
Rarity Status Glossary
Occurrence Data from CDFW
California Natural Diversity Database Glossary
  • Total # of Known Element Occurrences: 58
  • Element Occurrence Ranks:
    A B C D X U
    5 5 4 6 0 38
  • Population Status:
    >20 yrs
    <=20 yrs
    30 28
  • Presence:
    Present Extant Possibly Extirpated Presumed Extirpated
    58 0 0
Notes Glossary
  • Threatened by development, road construction, road maintenance, vehicles, vegetation clearing, and non-native plants. Plants from the coastal sector of the San Luis Range and Arroyo Grande drainage in SLO Co. were previously treated as A. wellsii. See Erythea 8:101 (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: 1974-01-01
  • Last Update: 2016-11-01
Location Glossary
  • Elevation: 75 - 1100 meters
  • California Endemic: yes
  • Other States:
  • California Counties and Islands:   name (code)
    San Luis Obispo (SLO)
  • Quads:   name (DWR code) USGS code
    Caldwell Mesa (220A) 3512023,  Tar Spring Ridge (220B) 3512024,  Nipomo (220C) 3512014,  Huasna Peak (220D) 3512013,  Arroyo Grande NE (221A) 3512025,  Pismo Beach (221B) 3512026,  Oceano (221D) 3512015,  Port San Luis (222A) 3512027,  La Panza (244C) 3512032,  Santa Margarita Lake (245C) 3512034,  Pozo Summit (245D) 3512033,  Atascadero (246B) 3512046,  San Luis Obispo (246C) 3512036,  Cypress Mountain (270C) 3512058
  • 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. This data should NOT be substituted for pre-project review or for on-site surveys.
Presumed Extant Presumed Extirpated or Unknown 36
Links to Leading Resources of Taxon Information
Suggested Citation
California Native Plant Society, Rare Plant Program. . Inventory of Rare and Endangered Plants of California (online edition, v8-03). Website http://www.rareplants.cnps.org [accessed ].

3512023=Caldwell Mesa (220A) 3512023;3512024=Tar Spring Ridge (220B) 3512024;3512014=Nipomo (220C) 3512014;3512013=Huasna Peak (220D) 3512013;3512025=Arroyo Grande NE (221A) 3512025;3512026=Pismo Beach (221B) 3512026;3512015=Oceano (221D) 3512015;3512027=Port San Luis (222A) 3512027;3512032=La Panza (244C) 3512032;3512034=Santa Margarita Lake (245C) 3512034;3512033=Pozo Summit (245D) 3512033;3512046=Atascadero (246B) 3512046;3512036=San Luis Obispo (246C) 3512036;3512058=Cypress Mountain (270C) 3512058