Arctostaphylos imbricata

Eastwood

Proc. Calif. Acad. Sci., ser. 4, 20: 149. 1931 ,

Common names: San Bruno Mountain manzanita
Synonyms: Arctostaphylos andersonii var. imbricata (Eastwood) J. E. Adams ex McMinn
Treatment appears in FNA Volume 8. Treatment on page 435. Mentioned on page 410.
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

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.

References

None.

Lower Taxa

No lower taxa listed.