Arctostaphylos imbricata |
Arctostaphylos otayensis |
|
---|---|---|
San Bruno Mountain manzanita |
Otay 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, 1–3 m; burl absent; twigs sparsely short-hairy, glandular-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. |
erect; petiole 5–8 mm; blade gray-glaucous, dull, narrowly elliptic or oblong-elliptic to ovate, 2–3 × 1–2 cm, base rounded or truncate, margins entire, plane, surfaces smooth, finely appressed-tomentose, ± glabrescent. |
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, 4–7-branched; immature inflorescence branches ascending to erect, axis 1.5–2.5 cm, 1+ mm diam., sparsely short glandular-hairy; bracts not appressed, (spreading), leaflike, linear-lanceolate, 6–12 mm, apex acuminate, surfaces finely glandular-hairy. |
Pedicels | 3–5 mm, densely glandular-hairy. |
3–8 mm, finely glandular-hairy. |
Flowers | corolla white, urceolate; ovary densely glandular-hairy. |
corolla white, conic to urceolate; ovary densely white-hairy, sparsely glandular. |
Fruits | depressed-globose, 6–7 mm diam., glandular-hairy, (± viscid). |
globose, 6–8 mm diam., sparsely hairy or glabrous. |
Stones | distinct. |
partially distinct or connate. |
2n | = 26. |
= 26. |
Arctostaphylos imbricata |
Arctostaphylos otayensis |
|
Phenology | Flowering winter–early spring. | Flowering winter–early spring. |
Habitat | Maritime chaparral on sandstone outcroppings | Chaparral |
Elevation | 100-200 m (300-700 ft) | 100-1200 m (300-3900 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 otayensis is found in the mountains of southern San Diego County (e.g., Guatay, Jamul, Otay), near the border with Baja California. It has been reported from southern Riverside County and northern Baja California as well; those localities need to be confirmed. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 8, p. 435. | FNA vol. 8, p. 426. |
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 , | Wieslander & B. Schreiber: Madroño 5: 43, fig. 2d. 1939 , |
Web links |