Arctostaphylos auriculata
Arctostaphylos crustacea
Mount Diablo manzanita, Mt. Diablo manzanita
brittle 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.
bifacial in stomatal distribution;
petiole 2–5 mm;
blade dull light green abaxially, shiny dark green adaxially, oblong-ovate to oblong-lanceolate, 2–5 × 1.5–2.5 cm, base truncate to ± lobed, margins entire (sometimes toothed), sometimes cupped or ± revolute, abaxial surface smooth, glabrous or sparsely or finely tomentose, adaxial surface smooth, ± glabrous (sometimes densely tomentose).
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, rarely ascending, branches spreading, axis 1–2.5 cm, 1+ mm diam., sparsely to densely short-hairy, sometimes glandular, or long-hairy eglandular;
bracts not appressed, proximal leaflike, distal often scalelike, from scalelike and awl-like to broadly leaflike and deltate to lanceolate, 3–8 mm, apex acute, surfaces glabrous or hairy.
4–10 mm, tomentose.
2–5 mm, glabrous or short-hairy.
corolla white to pink, conic;
ovary densely white-hairy.
corolla white, conic to urceolate;
ovary white-hairy or glabrous.
depressed-globose, 5–10 mm diam., short white-hairy, glabrescent.
depressed-globose, 6–10 mm diam., glabrous or sparsely hairy.
distinct.
distinct.
= 26.
Arctostaphylos auriculata
Arctostaphylos crustacea
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.)
Subspecies 6 (6 in the flora).
Arctostaphylos crustacea comprises populations from central California and the Channel Islands in areas moderated by summer maritime fog. One subspecies is widespread, from the San Francisco Bay area to the Channel Islands; the others are limited in distribution.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
1. Twigs, abaxial surface of leaf blades, and immature inflorescence axes densely glandular- hairy | subsp. subcordata |
1. Twigs, abaxial surface of leaf blades, and immature inflorescence axes glabrous or hairy, sometimes glandular (not densely glandular-hairy) | → 2 |
2. Twigs short-hairy and with longer hairs | → 3 |
2. Twigs usually short-hairy (without longer hairs) | → 4 |
3. Leaf blades ± glabrous or sparsely short-hairy abaxially. | subsp. crustacea |
3. Leaf blades densely short-hairy abaxially (and sometimes adaxially). | subsp. crinita |
4. Leaf blades tomentose abaxially. | subsp. insulicola |
4. Leaf blades glabrous abaxially | → 5 |
5. Ovaries glabrous. | subsp. eastwoodiana |
5. Ovaries densely hairy. | subsp. rosei |
CA
WildflowerSearch
iNaturalist
USDA Plants Database
