Arctostaphylos patula |
Arctostaphylos silvicola |
|
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green-leaf manzanita |
Bonny Doon manzanita, silverleaf manzanita |
|
Habit | Shrubs, erect or mound-forming, 1–3 m; burl usually absent, sometimes flat, obscure; twigs usually densely short-hairy with golden glands on tips of hairs, rarely short white-hairy and eglandular. | Shrubs, erect, 1–3 m; burl absent; twigs sparsely to densely soft-hairy. |
Leaves | petiole 7–15 mm; blade bright green (lightly gray-green if short-hairy), shiny, widely ovate to orbiculate, 2.5–6 × 1.5–4 cm, base rounded, truncate, or slightly lobed, (not clasping), margins entire, plane, surfaces smooth, glabrous or, rarely, short-hairy. |
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, 2–8-branched; immature inflorescence pendent, branches spreading, axis 1.5–3 cm, 1+ mm diam., hairy with golden glands on tips of hairs or short-hairy and eglandular; bracts appressed with incurved tips, scalelike, deltate, 4–6 mm, apex acuminate, surfaces usually densely tomentose with golden glands on tips of hairs, rarely short white-hairy and eglandular. |
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 | 2–7 mm, glabrous or white-hairy. |
5–7 mm, usually glabrous, sometimes sparsely hairy. |
Flowers | corolla mostly pink, conic to urceolate; ovary glabrous or white-hairy. |
corolla white, conic to urceolate; ovary glabrous. |
Fruits | depressed-globose, sometimes subglobose, 7–10 mm diam., glabrous. |
globose, 6–12 mm diam., glabrous. |
Stones | distinct. |
distinct. |
2n | = 26. |
= 26. |
Arctostaphylos patula |
Arctostaphylos silvicola |
|
Phenology | Flowering late spring–early summer. | Flowering winter–early spring. |
Habitat | Mountain chaparral and forests | Chaparral, open conifer forests |
Elevation | 400-3000 m (1300-9800 ft) | 100-500 m (300-1600 ft) |
Distribution |
AZ; CA; CO; MT; NV; OR; UT; WA; Mexico (Baja California)
|
CA
|
Discussion | Arctostaphylos patula is abundant and widespread in western North America as a dominant in montane chaparral, pine forest gaps, and high-elevation arid-steppe and canyon-land environments. Populations throughout western North America are characterized by twigs and inflorescence parts covered with relatively short hairs tipped with golden glands. In the central to northern Sierra Nevada, mixed with the widespread form are individuals that are eglandular and have a cover of relatively short, whitish hairs on the stems and inflorescences. Similarly, throughout most of its range, A. patula is nonsprouting after fire, and in areas characterized by winter snow cover it layers and creates broad, low mounds. In much of California, it typically sprouts after fires from obscure and flattened burls, forming circles of erect sprouts. (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. 416. | FNA vol. 8, p. 430. |
Parent taxa | Ericaceae > subfam. Arbutoideae > Arctostaphylos | Ericaceae > subfam. Arbutoideae > Arctostaphylos |
Sibling taxa | ||
Synonyms | A. acutifolia, A. parryana var. pinetorum, A. patula var. coalescens, A. patula subsp. platyphylla, A. platyphylla | |
Name authority | Greene: Pittonia 2: 171. 1891 , | Jepson & Wieslander: Erythea 8: 101. 1938 , |
Web links |