Arctostaphylos imbricata |
Arctostaphylos pumila |
|
---|---|---|
San Bruno Mountain manzanita |
sand-mat manzanita |
|
Habit | Shrubs, prostrate or mat- or mound-forming, 0.1–1 m; burl absent; twigs densely fine-hairy with long, gland-tipped hairs. | Shrubs, prostrate or mound-forming, 0.1–1 m; burl absent; twigs short gray-hairy. |
Leaves | petiole to 2 mm; blade light green, dull, orbiculate to orbiculate-ovate, 2.5–4 × 2–3 cm, base auriculate-clasping, margins entire, plane, surfaces papillate, ± scabrous, sparsely glandular-hairy. |
bifacial in stomatal distribution; petiole 2–3 mm; blade dull gray abaxially, dark green, ± shiny adaxially, narrowly obovate to oblanceolate, (convex), 1–2 × 0.5–1.5 cm, base cuneate, margins (tinged with red), entire, ± cupped, abaxial surface smooth, densely gray-tomentose, adaxial surface smooth, sparsely puberulent. |
Inflorescences | panicles, 3–5-branched; immature inflorescence pendent, (branches densely clustered, ± sessile), axis 0.5–1 cm, 1+ mm diam., densely fine-hairy with long, gland-tipped hairs; bracts appressed, leaflike, ovate, 5–10 mm, apex acute, surfaces glandular-hairy. |
racemes, simple or 1-branched; immature inflorescence pendent, axis 0.3–0.5 cm, 1+ mm diam., short gray-hairy; bracts not appressed, scalelike (proximalmost leaflike), lanceolate or oblanceolate, 2–3 mm, apex acute to mucronate, surfaces hairy or glabrous. |
Pedicels | 3–5 mm, densely glandular-hairy. |
3–4 mm, hairy. |
Flowers | corolla white, urceolate; ovary densely glandular-hairy. |
corolla white, urceolate; ovary white-hairy or ± glabrous. |
Fruits | depressed-globose, 6–7 mm diam., glandular-hairy, (± viscid). |
globose, 5–6 mm diam., sparsely hairy or glabrous. |
Stones | distinct. |
distinct. |
2n | = 26. |
= 26. |
Arctostaphylos imbricata |
Arctostaphylos pumila |
|
Phenology | Flowering winter–early spring. | Flowering winter–early spring. |
Habitat | Maritime chaparral on sandstone outcroppings | Sand dunes, maritime chaparral, open, closed-cone conifer forests |
Elevation | 100-200 m (300-700 ft) | 0-300 m (0-1000 ft) |
Distribution |
CA
|
CA
|
Discussion | Of conservation concern. Arctostaphylos imbricata occurs on San Bruno Mountain in San Mateo County. It is in the Center for Plant Conservation’s National Collection of Endangered Plants. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Of conservation concern. Arctostaphylos pumila is known from the southern Monterey Bay region, Monterey County. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 8, p. 435. | FNA vol. 8, p. 424. |
Parent taxa | Ericaceae > subfam. Arbutoideae > Arctostaphylos | Ericaceae > subfam. Arbutoideae > Arctostaphylos |
Sibling taxa | ||
Synonyms | A. andersonii var. imbricata | |
Name authority | Eastwood: Proc. Calif. Acad. Sci., ser. 4, 20: 149. 1931 , | Nuttall: Trans. Amer. Philos. Soc., n. s. 8: 266. 1842 , |
Web links |