Arctostaphylos auriculata |
Arctostaphylos hookeri |
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Mount Diablo manzanita, Mt. Diablo manzanita |
Hooker's manzanita, Raven's manzanita |
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Habit | Shrubs, erect, 1–4.5 m; burl absent; twigs densely white-hairy with long, white hairs. | Shrubs, prostrate or erect, mat- or mound-forming, 0.1–1.5 m; burl absent; bark on older stems persistent, reddish, smooth; twigs sparsely short-hairy. | ||||
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 1–8 mm; blade bright green, shiny, narrow-elliptic (rhombic) or lanceolate-elliptic to widely elliptic, 0.8–3 × 0.4–1.5 cm, base rounded to cuneate, margins entire, plane, surfaces smooth, ± puberulent, glabrescent. |
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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. |
racemes, simple or 1-branched; immature inflorescence pendent (crook-necked), axis 0.3–1 cm, 1+ mm diam., sparsely short-hairy; bracts not appressed, (weakly spreading), (congested), (dark green), scalelike, deltate, (globose, cuplike), 2–5 mm, apex acute, surfaces glabrous. |
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Pedicels | 4–10 mm, tomentose. |
2–6 mm, glabrous. |
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Flowers | corolla white to pink, conic; ovary densely white-hairy. |
corolla white, urceolate; ovary glabrous. |
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Fruits | depressed-globose, 5–10 mm diam., short white-hairy, glabrescent. |
globose, 3–6 mm diam., glabrous. |
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Stones | distinct. |
distinct. |
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2n | = 26. |
= 26. |
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Arctostaphylos auriculata |
Arctostaphylos hookeri |
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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 2 (2 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, p. 417. | ||||
Parent taxa | Ericaceae > subfam. Arbutoideae > Arctostaphylos | Ericaceae > subfam. Arbutoideae > Arctostaphylos | ||||
Sibling taxa | ||||||
Subordinate taxa | ||||||
Name authority | Eastwood: Bull. Torrey Bot. Club 32: 202. 1905 , | G. Don: Gen. Hist. 3: 836. 1834 , | ||||
Web links |