Arctostaphylos imbricata |
Arctostaphylos pajaroensis |
|
---|---|---|
San Bruno Mountain manzanita |
Pajaro 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, erect or mound-forming, 1–4 m; burl absent; bark on older stems persistent, gray, shredded; twigs short-hairy, sometimes with long hairs. |
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 to 2 mm; blade light green abaxially, dark blue-green, glaucous adaxially, dull, ovate to triangular-ovate, 2–4 × 1–2 cm, base distinctly lobed, auriculate-clasping, margins (tinged with red), entire, ± cupped, surfaces smooth, glabrous, midvein hairy abaxially. |
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. |
panicles, 2–5-branched; immature inflorescence pendent, branches spreading, axis 1–1.5 cm, 1+ mm diam., short-hairy, sometimes with long hairs; bracts not appressed, leaflike, linear-lanceolate, 5–10 mm, apex acuminate, surfaces glabrous. |
Pedicels | 3–5 mm, densely glandular-hairy. |
5–8 mm, finely hairy or glabrous. |
Flowers | corolla white, urceolate; ovary densely glandular-hairy. |
corolla white to pink, urceolate; ovary densely white-hairy. |
Fruits | depressed-globose, 6–7 mm diam., glandular-hairy, (± viscid). |
depressed-globose, 6–8 mm diam., sparsely hairy or glabrous. |
Stones | distinct. |
distinct. |
2n | = 26. |
= 26. |
Arctostaphylos imbricata |
Arctostaphylos pajaroensis |
|
Phenology | Flowering winter–early spring. | Flowering early winter–early spring. |
Habitat | Maritime chaparral on sandstone outcroppings | Maritime chaparral on deep to shallow, sandy soils or sandstone outcroppings |
Elevation | 100-200 m (300-700 ft) | 0-200 m (0-700 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 pajaroensis is found in the vicinity of the Pajaro Hills in Monterey County. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 8, p. 435. | FNA vol. 8, p. 432. |
Parent taxa | Ericaceae > subfam. Arbutoideae > Arctostaphylos | Ericaceae > subfam. Arbutoideae > Arctostaphylos |
Sibling taxa | ||
Synonyms | A. andersonii var. imbricata | A. andersonii var. pajaroensis |
Name authority | Eastwood: Proc. Calif. Acad. Sci., ser. 4, 20: 149. 1931 , | (J. E. Adams) J. E. Adams: J. Elisha Mitchell Sci. Soc. 56: 41. 1940 , |
Web links |