Species Details

Arctostaphylos pilosula

Santa Margarita manzanita

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Lifeform: perennial evergreen shrub
Blooming Period: Dec-May
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Elevation:
75 - 1100 meters
245 - 3610 feet
General Habitats:
  • Broadleafed upland forest
  • Closed-cone coniferous forest
  • Chaparral
  • Cismontane woodland
Microhabitat Details:
Microhabitat:
  • Sandstone (sometimes)
Notes:
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.
Threats:
Taxonomy:
Threat List Total: 13
Total EOs % of EOs
EOs with Threat Listed: 24 41 %
THREAT LIST:
Development 14 24%
Road/trail construction/maint. 7 12%
ORV activity 5 8%
Wood cutting or brush clearing 4 6%
Grazing 3 5%
Total Occurrences: 58
Element Occurrence Ranks:
A B C D X U
5 5 4 6 0 38
Occurrence Status:
Historical >20 Years 39
Recent <=20 Years 19
Presence:
Presumed Extant 58
Possibly Extirpated 0
Presumed Extirpated 0
California Endemic:
California Island:
States: Name (Code)
California (CA)
California Counties and Islands: Name (Code)
San Luis Obispo (SLO)
Quads: Name (Quad Code)
Arroyo Grande NE (3512025), Atascadero (3512046), Caldwell Mesa (3512023), Huasna Peak (3512013), La Panza (3512032), Lopez Mtn. (3512035), Morro Bay South (3512037), Nipomo (3512014), Oceano (3512015), Pismo Beach (3512026), Port San Luis (3512027), Pozo Summit (3512033), San Luis Obispo (3512036), Santa Margarita Lake (3512034), Tar Spring Ridge (3512024)
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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