Arctostaphylos auriculata |
Arctostaphylos manzanita |
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Mount Diablo manzanita, Mt. Diablo manzanita |
common manzanita, whiteleaf manzanita |
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Habit | Shrubs, erect, 1–4.5 m; burl absent; twigs densely white-hairy with long, white hairs. | Shrubs or trees, erect, 2–8 m; burl absent or prominent, globose; twigs glabrous, sparsely short-hairy, or glandular-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 6–12 mm; blade bright green or glaucous, shiny or dull, widely ovate or oblong-ovate to obovate, 2–5 × 1–3.5 cm, base rounded to ± cuneate, margins entire, plane, surfaces smooth or scabrous, puberulent or veins finely hairy. |
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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, 3–7-branched; immature inflorescence ± abruptly deflexed, branches spreading, axis 1.5–4.5 cm, 1+ mm diam., glabrous, sparsely short-hairy, or sparsely glandular-hairy, not viscid; bracts not fully appressed, scalelike, deltate, 2–4 mm, apex mucronate or acuminate, surfaces glabrous or sparsely hairy to finely glandular-hairy. |
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Pedicels | 4–10 mm, tomentose. |
3–8 mm, glabrous. |
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Flowers | corolla white to pink, conic; ovary densely white-hairy. |
corolla white, conic to urceolate; ovary glabrous or minutely stipitate glandular-hairy. |
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Fruits | depressed-globose, 5–10 mm diam., short white-hairy, glabrescent. |
depressed-globose, 8–12 mm diam., hairy or glabrous, stipitate-glandular or smooth. |
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Stones | distinct. |
distinct, sometimes connate. |
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2n | = 26. |
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Arctostaphylos auriculata |
Arctostaphylos manzanita |
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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 6 (6 in the flora). Arctostaphylos manzanita is usually found in northern California in oak woodlands, chaparral, and open conifer forests. Subspecies manzanita is widespread throughout the Sierra Nevada foothills, north through the Cascades, and at lower elevations in the North Coast Ranges. The other subspecies are generally narrowly distributed. (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. 437. | ||||||||||||||||||||
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: 491. 1887 , | ||||||||||||||||||||
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