Arctostaphylos auriculata
Arctostaphylos patula
Mount Diablo manzanita, Mt. Diablo manzanita
green-leaf manzanita
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.
petiole 7–15 mm;
blade bright green (lightly gray-green if short-hairy), shiny, widely ovate to orbiculate, 2.5–6 × 1.5–4 cm, base rounded, truncate, or slightly lobed, (not clasping), margins entire, plane, surfaces smooth, glabrous or, rarely, short-hairy.
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.
panicles, 2–8-branched;
immature inflorescence pendent, branches spreading, axis 1.5–3 cm, 1+ mm diam., hairy with golden glands on tips of hairs or short-hairy and eglandular;
bracts appressed with incurved tips, scalelike, deltate, 4–6 mm, apex acuminate, surfaces usually densely tomentose with golden glands on tips of hairs, rarely short white-hairy and eglandular.
4–10 mm, tomentose.
2–7 mm, glabrous or white-hairy.
corolla white to pink, conic;
ovary densely white-hairy.
corolla mostly pink, conic to urceolate;
ovary glabrous or white-hairy.
depressed-globose, 5–10 mm diam., short white-hairy, glabrescent.
depressed-globose, sometimes subglobose, 7–10 mm diam., glabrous.
distinct.
distinct.
= 26.
= 26.
Arctostaphylos auriculata
Arctostaphylos patula
Of conservation concern.
Arctostaphylos auriculata is found on the western slopes of Mount Diablo in Contra Costa County.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
Arctostaphylos patula is abundant and widespread in western North America as a dominant in montane chaparral, pine forest gaps, and high-elevation arid-steppe and canyon-land environments. Populations throughout western North America are characterized by twigs and inflorescence parts covered with relatively short hairs tipped with golden glands. In the central to northern Sierra Nevada, mixed with the widespread form are individuals that are eglandular and have a cover of relatively short, whitish hairs on the stems and inflorescences. Similarly, throughout most of its range, A. patula is nonsprouting after fire, and in areas characterized by winter snow cover it layers and creates broad, low mounds. In much of California, it typically sprouts after fires from obscure and flattened burls, forming circles of erect sprouts.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
CA
WildflowerSearch
iNaturalist
USDA Plants Database
OR
WA
Flora NW
PNW Herbaria
SW CO Wildflowers
