Arctostaphylos auriculata |
Arctostaphylos myrtifolia |
|
---|---|---|
Mount Diablo manzanita, Mt. Diablo manzanita |
Ione manzanita |
|
Habit | Shrubs, erect, 1–4.5 m; burl absent; twigs densely white-hairy with long, white hairs. | Shrubs, erect or mound-forming, 0.5–1.5 m; burl absent; bark on older stems persistent, dark red with translucent, grayish patches, smooth; 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. |
erect; petiole 1–3 mm; blade bright green, shiny, narrowly elliptic, 0.6–1.5 × 0.3–0.8 cm, base cuneate, margins entire, plane, surfaces rough, papillate, sparsely 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. |
racemes, simple or 1-branched; immature inflorescence pendent, axis 0.5–1 cm, 1+ mm diam., finely glandular-hairy; bracts not appressed, scalelike, deltate, 1–2 mm, apex acuminate, surfaces glabrous. |
Pedicels | 4–10 mm, tomentose. |
1–3 mm, glabrous. |
Flowers | corolla white to pink, conic; ovary densely white-hairy. |
corolla white, urceolate; ovary white-hairy. |
Fruits | depressed-globose, 5–10 mm diam., short white-hairy, glabrescent. |
subcylindric, 3–4 mm diam., glabrous. |
Stones | distinct. |
distinct, (breaking apart when mature). |
2n | = 26. |
= 26. |
Arctostaphylos auriculata |
Arctostaphylos myrtifolia |
|
Phenology | Flowering winter–early spring. | Flowering winter–early spring. |
Habitat | Chaparral, open, closed-cone conifer forests | Exposed acidic, whitish, clay soils (oxisols) |
Elevation | 300-500 m (1000-1600 ft) | 30-200 m (100-700 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 myrtifolia is known only from the lower Sierra Nevada foothills near Ione in the eastern part of the Central Valley. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 8, p. 430. | FNA vol. 8, p. 415. |
Parent taxa | Ericaceae > subfam. Arbutoideae > Arctostaphylos | Ericaceae > subfam. Arbutoideae > Arctostaphylos |
Sibling taxa | ||
Name authority | Eastwood: Bull. Torrey Bot. Club 32: 202. 1905 , | Parry: Pittonia 1: 34. 1887 , |
Web links |