Arctostaphylos auriculata |
Arctostaphylos pringlei |
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Mount Diablo manzanita, Mt. Diablo manzanita |
Pringle manzanita, yellowleaf manzanita |
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Habit | Shrubs, erect, 1–4.5 m; burl absent; twigs densely white-hairy with long, white hairs. | Shrubs, erect, 1–5 m; burl absent; twigs densely short 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 5–10 mm; blade gray-glaucous, dull, elliptic, ovate, or ± orbiculate, 2–5 × 1–4 cm, base rounded, truncate, or ± lobed, margins entire, plane, surfaces papillate, scabrous, finely glandular-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. |
racemes, simple or 1-branched; immature inflorescence (developing late), pendent or erect, (concealed by bracts), axis 1–1.5 cm, 1+ mm diam., densely short glandular-hairy; bracts deciduous after flowering, (crowded), appressed, (bright pink), leaflike, lanceolate, 6–10 mm, apex acute, surfaces densely glandular-hairy. |
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Pedicels | 4–10 mm, tomentose. |
5–15 mm, finely glandular-hairy. |
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Flowers | corolla white to pink, conic; ovary densely white-hairy. |
corolla white to pink, conic to urceolate; ovary glandular-hairy. |
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Fruits | depressed-globose, 5–10 mm diam., short white-hairy, glabrescent. |
globose, 6–12 mm diam., finely glandular-hairy, (viscid). |
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Stones | distinct. |
distinct or connate. |
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2n | = 26. |
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Arctostaphylos auriculata |
Arctostaphylos pringlei |
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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 |
AZ; CA; NV; UT; nw Mexico
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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. 427. | ||||
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: 494. 1887 , | ||||
Web links |