Arctostaphylos pacifica |
Arctostaphylos sensitiva |
|
---|---|---|
Pacific manzanita |
coinleaf manzanita, dwarf manzanita, glossyleaf manzanita |
|
Habit | Shrubs, prostrate or mound-forming, 0.1–0.3 m; burl present, sometimes epicormic; twigs short-hairy. | 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 2–4 mm; blade light green abaxially, dark green adaxially, shiny, elliptic, 1–2 × 0.5–1 cm, base cuneate, margins serrulate, plane, surfaces smooth, sparsely 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 | racemes, (simple or 1-branched); immature inflorescence pendent, (congested), axis 0.5–1 cm, 1+ mm diam., short-hairy; bracts appressed, scalelike, awl-like, 0.5–1 mm, apex acute, glabrous. |
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 | 3–5 mm, glabrous. |
3–5 mm, glabrous. |
Flowers | corolla white, urceolate; ovary glabrous. |
4-merous; corolla white to pink, urceolate; ovary white-hairy. |
Fruits | (reddish), globose, 6–8 mm diam., glabrous. |
subcylindric, 3–4 mm diam., glabrous. |
Stones | distinct. |
distinct (breaking apart in mature fruit). |
2n | = 26. |
|
Arctostaphylos pacifica |
Arctostaphylos sensitiva |
|
Phenology | Flowering winter–early spring. | Flowering winter–early spring. |
Habitat | Sandstone outcrops | Sandstone uplands in maritime chaparral or closed-cone conifer forests near coast |
Elevation | 300 m (1000 ft) | 100-600 m (300-2000 ft) |
Distribution |
CA
|
CA
|
Discussion | Of conservation concern. A distinctive species with an uncertain origin, Arctostaphylos pacifica has often been relegated to hybrid status and ignored; it displays a number of unique characters not found in any other species. It is found only at one location, San Bruno Mountain, the northern part of the Santa Cruz Mountains, San Mateo County. The relationships of this species need additional study. (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. 415. | FNA vol. 8, p. 418. |
Parent taxa | Ericaceae > subfam. Arbutoideae > Arctostaphylos | Ericaceae > subfam. Arbutoideae > Arctostaphylos |
Sibling taxa | ||
Synonyms | A. nummularia subsp. sensitiva, A. nummularia var. sensitiva | |
Name authority | Roof: Leafl. W. Bot. 9: 217. 1962 , | Jepson: Madroño 1: 85. 1922 , |
Web links |