Arctostaphylos auriculata |
Arctostaphylos hispidula |
|
---|---|---|
Mount Diablo manzanita, Mt. Diablo manzanita |
Gasquet manzanita, Howell's manzanita |
|
Habit | Shrubs, erect, 1–4.5 m; burl absent; twigs densely white-hairy with long, white hairs. | Shrubs, erect or mound-forming, 1–3 m; burl absent; twigs finely 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 3–6 mm; blade dark green, dull, elliptic to oblanceolate, 1–3 × 0.5–1.5 cm, base cuneate, margins entire, plane, surfaces scabrous, papillate, finely glandular-hairy. |
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, 3–6-branched; immature inflorescence pendent, branches spreading or ascending to erect, axis 1–2 cm, to 1 mm diam., finely glandular-hairy; bracts tightly appressed, scalelike, awl-like, 2–4 mm (equaling buds), apex acuminate, surfaces finely glandular-hairy; (buds scattered along inflorescence axis, round, appearing as “beads”). |
Pedicels | 4–10 mm, tomentose. |
3–5 mm, glabrous. |
Flowers | corolla white to pink, conic; ovary densely white-hairy. |
corolla white, urceolate; ovary glabrous. |
Fruits | depressed-globose, 5–10 mm diam., short white-hairy, glabrescent. |
subglobose, 5–7 mm diam., glabrous. |
Stones | distinct. |
distinct. |
2n | = 26. |
= 26. |
Arctostaphylos auriculata |
Arctostaphylos hispidula |
|
Phenology | Flowering winter–early spring. | Flowering winter–early spring. |
Habitat | Chaparral, open, closed-cone conifer forests | Serpentine chaparral and open forests on sandstone |
Elevation | 300-500 m (1000-1600 ft) | 100-1100 m (300-3600 ft) |
Distribution |
CA |
CA; OR
|
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.) |
Arctostaphylos hispidula is known from Josephine County, Oregon, and adjacent California in Del Norte and Humboldt counties; there is an isolated population in northern Sonoma County, California. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 8, p. 430. | FNA vol. 8, p. 420. |
Parent taxa | Ericaceae > subfam. Arbutoideae > Arctostaphylos | Ericaceae > subfam. Arbutoideae > Arctostaphylos |
Sibling taxa | ||
Synonyms | A. stanfordiana subsp. hispidula | |
Name authority | Eastwood: Bull. Torrey Bot. Club 32: 202. 1905 , | Howell: Fl. N.W. Amer., 415. 1901 , |
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