Arctostaphylos auriculata


Bull. Torrey Bot. Club 32: 202. 1905 ,.

Common names: Mount Diablo manzanita
EndemicConservation concern
Treatment appears in FNA Volume 8. Treatment on page 430. Mentioned on page 413, 431.

Shrubs, erect, 1–4.5 m; burl absent; twigs densely white-hairy with long, white hairs. Leaves: petiole to 2 mm; blade whitish gray, dull, oblong-ovate to orbiculate-ovate, 1.5–4.5 × 1.5–3 cm, base distinctly lobed, auriculate-clasping, margins entire, plane, surfaces smooth, gray-canescent, glabrescent. Inflorescences panicles, 3–5-branched; immature inflorescence pendent, (branches crowded, ± obscured by bracts), axis 1–1.5 cm, 1+ mm diam., densely white-hairy with long, white hairs; bracts somewhat appressed, leaflike, ovate to lanceolate-ovate, 5–15 mm, apex acute, surfaces canescent. Pedicels 4–10 mm, tomentose. Flowers: corolla white to pink, conic; ovary densely white-hairy. Fruits depressed-globose, 5–10 mm diam., short white-hairy, glabrescent. Stones distinct. 2n = 26.

Phenology: Flowering winter–early spring.
Habitat: Chaparral, open, closed-cone conifer forests
Elevation: 300-500 m


Of conservation concern.

Arctostaphylos auriculata is found on the western slopes of Mount Diablo in Contra Costa County.

Selected References


Lower Taxa

... more about "Arctostaphylos auriculata"
V. Thomas Parker +, Michael C. Vasey +  and Jon E. Keeley +
Eastwood +
Mount Diablo manzanita +
300-500 m +
Chaparral, open, closed-cone conifer forests +
Flowering winter–early spring. +
Bull. Torrey Bot. Club +
Endemic +  and Conservation concern +
Undefined tribe Arbuteae +
Arctostaphylos auriculata +
Arctostaphylos +
species +