Arctostaphylos auriculata |
Arctostaphylos pilosula |
|
---|---|---|
Mount Diablo manzanita, Mt. Diablo manzanita |
La Panza manzanita, Santa Margarita manzanita |
|
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 short-hairy and hispid. |
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 4–8 mm; blade dark green to gray-glaucous, dull, narrowly elliptic to orbiculate-ovate, 1–3 × 1–2 cm, base cuneate or truncate to slightly lobed, margins entire, plane, surfaces smooth, glabrous. |
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 pendent, axis 1–2 cm, 1+ mm diam., short-hairy with long hairs; bracts not appressed, (green), leaflike, lanceolate, 8–15 mm, apex acute, surfaces long-hairy. |
Pedicels | 4–10 mm, tomentose. |
2–5 mm, glabrous. |
Flowers | corolla white to pink, conic; ovary densely white-hairy. |
corolla white to pink, urceolate; ovary glabrous. |
Fruits | depressed-globose, 5–10 mm diam., short white-hairy, glabrescent. |
depressed-globose, 8–10 mm diam., glabrous. |
Stones | distinct. |
distinct. |
2n | = 26. |
= 26. |
Arctostaphylos auriculata |
Arctostaphylos pilosula |
|
Phenology | Flowering winter–early spring. | Flowering winter–early spring. |
Habitat | Chaparral, open, closed-cone conifer forests | Chaparral, open forests |
Elevation | 300-500 m (1000-1600 ft) | 0-1200 m (0-3900 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 pilosula occurs in San Luis Obispo County and exhibits some variation in leaf shape and color, as well as indument. Plants at higher elevations and farther inland may reflect introgression with A. glauca. Some lower-elevation populations historically have been segregated as subsp. pismoensis or A. wellsii. Field observation suggests that there is a morphological cline between coastal and interior populations so that taxonomic distinctions between these populations are unwarranted. Further taxonomic analysis might help to resolve this situation. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 8, p. 430. | FNA vol. 8, p. 426. |
Parent taxa | Ericaceae > subfam. Arbutoideae > Arctostaphylos | Ericaceae > subfam. Arbutoideae > Arctostaphylos |
Sibling taxa | ||
Synonyms | A. pilosula subsp. pismoensis, A. wellsii | |
Name authority | Eastwood: Bull. Torrey Bot. Club 32: 202. 1905 , | Jepson & Wieslander: Erythea 8: 101. 1938 , |
Web links |