Arctostaphylos patula |
Arctostaphylos sensitiva |
|
---|---|---|
green-leaf manzanita |
coinleaf manzanita, dwarf manzanita, glossyleaf 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 or mound-forming, 1–2 m; burl absent; bark on older stems red, smooth; twigs densely short-haired with longer gland-tipped hairs. |
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. |
bifacial in stomatal distribution; petiole 1–3 mm; blade light green abaxially, dark green adaxially, shiny, orbiculate to orbiculate-ovate, 1–2.2 × 0.8–1.8 cm, base truncate to ± lobed, margins entire, cupped, surfaces smooth, glabrous, midvein hairy. |
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. |
panicles, 4–8-branched; immature inflorescence pendent, branches spreading, axis 0.5–1 cm, to 1 mm diam., densely short-hairy with longer gland-tipped hairs; bracts appressed, scalelike, deltate, 0.5–2 mm, apex acute, surfaces glabrous. |
Pedicels | 2–7 mm, glabrous or white-hairy. |
3–5 mm, glabrous. |
Flowers | corolla mostly pink, conic to urceolate; ovary glabrous or white-hairy. |
4-merous; corolla white to pink, urceolate; ovary white-hairy. |
Fruits | depressed-globose, sometimes subglobose, 7–10 mm diam., glabrous. |
subcylindric, 3–4 mm diam., glabrous. |
Stones | distinct. |
distinct (breaking apart in mature fruit). |
2n | = 26. |
= 26. |
Arctostaphylos patula |
Arctostaphylos sensitiva |
|
Phenology | Flowering late spring–early summer. | Flowering winter–early spring. |
Habitat | Mountain chaparral and forests | Sandstone uplands in maritime chaparral or closed-cone conifer forests near coast |
Elevation | 400-3000 m (1300-9800 ft) | 100-600 m (300-2000 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 sensitiva occurs in Marin, San Mateo, and Santa Cruz counties. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 8, p. 416. | FNA vol. 8, p. 418. |
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 | A. nummularia subsp. sensitiva, A. nummularia var. sensitiva |
Name authority | Greene: Pittonia 2: 171. 1891 , | Jepson: Madroño 1: 85. 1922 , |
Web links |