Arctostaphylos auriculata |
Arctostaphylos stanfordiana |
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Mount Diablo manzanita, Mt. Diablo manzanita |
Stanford's manzanita |
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Habit | Shrubs, erect, 1–4.5 m; burl absent; twigs densely white-hairy with long, white hairs. | Shrubs, erect or prostrate to decumbent, mat- or mound-forming, 0.1–3 m; burl absent; twigs usually glabrous, sometimes sparsely short-hairy, hairs sometimes glandular. | ||||||||
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. |
petiole 4–12 mm; blade bright green, shiny or slightly glaucous, elliptic, oblong, or oblanceolate, 3–5 × 1.5–2.5 cm, base cuneate, (not clasping), margins entire, plane, surfaces smooth, glabrous or, rarely, finely glandular-puberulent. |
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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. |
panicles, 3–5-branched; immature inflorescence ascendent, branches wide-spreading, often ascending to erect, axis 2–2.5 cm, to 1 mm diam., usually glabrous, sparsely hairy, or sometimes sparsely glandular-hairy; bracts tightly appressed, scalelike, ovate to deltate, 1–1.5 mm (± equaling buds), apex acuminate, surfaces usually sparsely hairy or sometimes sparsely glandular-hairy; (buds scattered along inflorescence axis, round, appearing as “beads”). |
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Pedicels | 4–10 mm, tomentose. |
5–10 mm, glabrous. |
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Flowers | corolla white to pink, conic; ovary densely white-hairy. |
corolla white to pink, urceolate; ovary glabrous. |
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Fruits | depressed-globose, 5–10 mm diam., short white-hairy, glabrescent. |
subglobose, 6–8 mm diam., glabrous. |
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Stones | distinct. |
distinct. |
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2n | = 26. |
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Arctostaphylos auriculata |
Arctostaphylos stanfordiana |
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Phenology | Flowering winter–early spring. | |||||||||
Habitat | Chaparral, open, closed-cone conifer forests | |||||||||
Elevation | 300-500 m (1000-1600 ft) | |||||||||
Distribution |
CA |
CA
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Discussion | 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 3 (3 in the flora). (Discussion copyrighted by Flora of North America; reprinted with permission.) |
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Key |
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Source | FNA vol. 8, p. 430. | FNA vol. 8. | ||||||||
Parent taxa | Ericaceae > subfam. Arbutoideae > Arctostaphylos | Ericaceae > subfam. Arbutoideae > Arctostaphylos | ||||||||
Sibling taxa | ||||||||||
Subordinate taxa | ||||||||||
Name authority | Eastwood: Bull. Torrey Bot. Club 32: 202. 1905 , | Parry: Bull. Calif. Acad. Sci. 2: 493. 1887 , | ||||||||
Web links |