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Plant Profile

Mt. Diablo Manzanita (Arctostaphylos auriculata)

Photo Credit: ©2016 John Doyen
  • Global Rank: G2 - Imperiled
  • Legal Status: N/A
  • Family: Ericaceae
  • State: CA
  • Nature Serve ID: 135324
  • Lifeform: Shrub
  • Date Inducted in National Collection:

Arctostaphylos auriculata, or the Mt. Diablo Manzanita, is a low, evergreen shrub that can only be found in the Mt. Diablo area (Contra Costa County) where other endemic species can be found including the Mt. Diablo sunflower (Helianthelia castanea) and Mt. Diablo fairy-lantern (Calochortus pulchellus). It is in this region where A. auriculata thrives in lower montane chaparral. Characteristic of manzanitas, theyre woody shrubs that sprout pink, hanging, bell-shaped blooms between January and March, eventually maturing into apple-shaped fruit. There are currently Imperiled with about 19 known occurrences as of 2005. This species is restricted to Mt. Diablo mainly because of its preferences for sandstone but other factors include off-trail use, fire suppression, brush clearing, and grazing.

Where is Mt. Diablo Manzanita (Arctostaphylos auriculata) located in the wild?


Mt. Diablo, the sole occurrence of A. auriculata, consists mainly of chaparral flora and sandstone. 


As its common name suggests, the Mt. Diablo manzanita is endemic and can only be found on or near Mt. Diablo in Contra Costa county. 

States & Provinces:

Mt. Diablo Manzanita can be found in California

Which CPC Partners conserve Mt. Diablo Manzanita (Arctostaphylos auriculata)?

CPC's Plant Sponsorship Program provides long term stewardship of rare plants in our National Collection. We are so grateful for all our donors who have made the Plant Sponsorship Program so successful. We are in the process of acknowledging all our wonderful plant sponsorship donors on our website. This is a work in progress and will be updated regularly.

Conservation Actions

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Taxon Arctostaphylos auriculata
Authority Eastw.
Family Ericaceae
CPC Number 208
ITIS 23473
Duration Perennial
Common Names Mt. Diablo manzanita | Mount Diablo manzanita
Associated Scientific Names Arctostaphylos auriculata | Arctostaphylos andersonii var. auriculata | Uva-ursi auriculata
Distribution As its common name suggests, the Mt. Diablo manzanita is endemic and can only be found on or near Mt. Diablo in Contra Costa county. 
State Rank
State State Rank
California S2
Ecological Relationships


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