Arctostaphylos auriculata |
Arctostaphylos silvicola |
|
---|---|---|
Mount Diablo manzanita, Mt. Diablo manzanita |
Bonny Doon manzanita, silverleaf manzanita |
|
Habit | Shrubs, erect, 1–4.5 m; burl absent; twigs densely white-hairy with long, white hairs. | Shrubs, erect, 1–3 m; burl absent; twigs sparsely to densely soft-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 3–8 mm; blade gray, glaucous, dull, narrowly obovate or oblong-elliptic, 1.5–3.5 × 1–1.5 cm, base cuneate, margins entire, plane, surfaces smooth, appressed gray-canescent, glabrescent. |
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. |
racemelike, simple or 1–2-branched; immature inflorescence pendent, (branches bell-shaped, framed by bracts), axis 0.5–1 cm, 1+ mm diam., sparsely to densely soft-hairy; bracts not appressed, leaflike, lanceolate, 5–12 mm, apex acute to obtuse, surfaces canescent or glabrous. |
Pedicels | 4–10 mm, tomentose. |
5–7 mm, usually glabrous, sometimes sparsely hairy. |
Flowers | corolla white to pink, conic; ovary densely white-hairy. |
corolla white, conic to urceolate; ovary glabrous. |
Fruits | depressed-globose, 5–10 mm diam., short white-hairy, glabrescent. |
globose, 6–12 mm diam., glabrous. |
Stones | distinct. |
distinct. |
2n | = 26. |
= 26. |
Arctostaphylos auriculata |
Arctostaphylos silvicola |
|
Phenology | Flowering winter–early spring. | Flowering winter–early spring. |
Habitat | Chaparral, open, closed-cone conifer forests | Chaparral, open conifer forests |
Elevation | 300-500 m (1000-1600 ft) | 100-500 m (300-1600 ft) |
Distribution |
CA |
CA
|
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.) |
Of conservation concern. Arctostaphylos silvicola is known from deep, sandy soils near the coast in chaparral and open conifer forests of the central Santa Cruz Mountains, Santa Cruz County. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 8, p. 430. | FNA vol. 8, p. 430. |
Parent taxa | Ericaceae > subfam. Arbutoideae > Arctostaphylos | Ericaceae > subfam. Arbutoideae > Arctostaphylos |
Sibling taxa | ||
Name authority | Eastwood: Bull. Torrey Bot. Club 32: 202. 1905 , | Jepson & Wieslander: Erythea 8: 101. 1938 , |
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