Proc. Calif. Acad. Sci., ser. 4, 20: 149. 1931 ,.
Shrubs, prostrate or mat- or mound-forming, 0.1–1 m; burl absent; twigs densely fine-hairy with long, gland-tipped 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. 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. Pedicels 3–5 mm, densely glandular-hairy. Flowers: corolla white, urceolate; ovary densely glandular-hairy. Fruits depressed-globose, 6–7 mm diam., glandular-hairy, (± viscid). Stones distinct. 2n = 26.
Phenology: Flowering winter–early spring.
Habitat: Maritime chaparral on sandstone outcroppings
Elevation: 100-200 m
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.