SafePlants

Arctostaphylos auriculata: The Mount Diablo Manzanita

Arctostaphylos auriculata, commonly known as the Mount Diablo Manzanita or Mt. Diablo Manzanita, is an endangered species endemic to California.

Considerations for Pets

• The text mentions that the plant is commonly found in gardens, potentially increasing the likelihood of interaction with pets.

Taxonomy and Nomenclature

• Scientific Name: Arctostaphylos auriculata Eastw.
• Common Names: Mount Diablo Manzanita, Mt. Diablo Manzanita
• Family: Not explicitly mentioned, but the genus Arctostaphylos belongs to the Ericaceae family.

Distribution and Habitat

• The Mount Diablo Manzanita is exclusively found in the area surrounding Mount Diablo, Contra Costa County, California.
• Its global range is limited to this region, specifically between 500-2000 ft in elevation, covering approximately 260 square miles across 5 quads.

Ecological Role

• The Mount Diablo Manzanita is a non-sprouter, which means it doesn't regenerate from its roots after a fire. This makes it particularly vulnerable to habitat loss due to increased fire frequency.

Morphological Characteristics

• The Mount Diablo Manzanita has grayish, hairy leaves with a heart-shaped base.
• It is known for having pink blossoms.
• The plant has distinctive curving trunks.

Interactions with Other Organisms

• The Manzanita Leaf Gall Aphid (Tamalia coweni) has been observed on Arctostaphylos auriculata in the Mount Diablo area.

Further Information

• East Contra Costa County HCP/NCCP provides species accounts.
• Discover Life offers information on the biology, natural history, ecology, identification, and distribution of Arctostaphylos auriculata.
• The California Native Plant Society may have usage restrictions for photos and associated text.