Arctostaphylos auriculata |
Arctostaphylos canescens |
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Mount Diablo manzanita, Mt. Diablo manzanita |
downy manzanita, hoary manzanita |
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Habit | Shrubs, erect, 1–4.5 m; burl absent; twigs densely white-hairy with long, white hairs. | Shrubs, erect, 0.3–3 m; burl absent; twigs densely short soft-hairy to white-tomentose. | ||||
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 3–10 mm; blade whitish gray, dull, orbiculate-ovate, ovate, or elliptic, 2–5 × 1–3 cm, base rounded to cuneate, margins entire, plane, surfaces smooth, gray-canescent, 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. |
panicles, 1–3-branched, immature inflorescence pendent, (branches crowded, bell-shaped, ± obscured by bracts), axis 1–2 cm, 1+ mm diam., densely short soft-hairy to white-tomentose; bracts not appressed, (spreading), leaflike, wide-lanceolate, 6–20 mm, apex acute, surfaces canescent. |
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Pedicels | 4–10 mm, tomentose. |
5–9 mm, hairy, sometimes glandular. |
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Flowers | corolla white to pink, conic; ovary densely white-hairy. |
corolla white to pink, conic to urceolate; ovary densely white-hairy, sometimes glandular. |
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Fruits | depressed-globose, 5–10 mm diam., short white-hairy, glabrescent. |
depressed-globose, 5–10 mm diam., sparsely hairy or glabrous, sometimes sparsely glandular. |
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Stones | distinct. |
distinct. |
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2n | = 26. |
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Arctostaphylos auriculata |
Arctostaphylos canescens |
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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; OR
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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). Arctostaphylos canescens is widespread in the Coast Ranges of central and northern California and northward into southwestern Oregon. (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. 429. | ||||
Parent taxa | Ericaceae > subfam. Arbutoideae > Arctostaphylos | Ericaceae > subfam. Arbutoideae > Arctostaphylos | ||||
Sibling taxa | ||||||
Subordinate taxa | ||||||
Name authority | Eastwood: Bull. Torrey Bot. Club 32: 202. 1905 , | Eastwood: Proc. Calif. Acad. Sci., ser. 3, 1: 84. 1897 , | ||||
Web links |