Arctostaphylos auriculata |
Arctostaphylos mewukka |
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Mount Diablo manzanita, Mt. Diablo manzanita |
Indian manzanita |
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Habit | Shrubs, erect, 1–4.5 m; burl absent; twigs densely white-hairy with long, white hairs. | Shrubs, erect, 1–3 m; burl present or absent; twigs glabrous or slightly hairy and sparsely 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 6–15 mm; blade intensely gray- or white-glaucous, dull, orbiculate, orbiculate-ovate, oblong-ovate, or lanceolate-ovate, 3–7 × 2–7 cm, base rounded, margins entire, plane, apex acute or obtuse, surfaces smooth, glabrous. |
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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, 2–7-branched; immature inflorescence pendent, axis 2–3 cm, 1+ mm diam., glabrous or slightly hairy, sometimes glandular; bracts tightly appressed, scalelike, deltate to linear-lanceolate, 3–6 mm, apex acute or acuminate, surfaces glabrous. |
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Pedicels | 4–10 mm, tomentose. |
4–8 mm, glabrous. |
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Flowers | corolla white to pink, conic; ovary densely white-hairy. |
corolla white, conic to urceolate; ovary glabrous. |
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Fruits | depressed-globose, 5–10 mm diam., short white-hairy, glabrescent. |
(dark mahogany-brown), globose, 12–16 mm diam., glabrous. |
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Stones | distinct. |
distinct, sometimes connate. |
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2n | = 26. |
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Arctostaphylos auriculata |
Arctostaphylos mewukka |
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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). Arctostaphylos mewukka is found on the western slopes of the central and northern Sierra Nevada. (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. 421. | ||||
Parent taxa | Ericaceae > subfam. Arbutoideae > Arctostaphylos | Ericaceae > subfam. Arbutoideae > Arctostaphylos | ||||
Sibling taxa | ||||||
Subordinate taxa | ||||||
Name authority | Eastwood: Bull. Torrey Bot. Club 32: 202. 1905 , | Merriam: Proc. Biol. Soc. Wash. 31: 101, plates 2, 3. 1918 , | ||||
Web links |