Arctostaphylos franciscana

Eastwood

Bull. Torrey Bot. Club 32: 201. 1905,

EndemicConservation concern
Synonyms: Arctostaphylos hookeri subsp. franciscana (Eastwood) Munz
Treatment appears in FNA Volume 8. Treatment on page 425. Mentioned on page 410, 411.

Shrubs, prostrate or mat-forming, 0.2–1.5 m; burl absent; twigs gray-hairy. Leaves: petiole 3–5 mm, (eglandular); blade bright green, shiny, oblanceolate, 1.5–2 × 0.5–1 cm, base cuneate, margins entire, plane, surfaces smooth, ± puberulent, glabrescent. Inflorescences panicles, 1–3-branched; immature inflorescence pendent, (branches compact), axis 0.5–1 cm, 1+ mm diam., gray-hairy; bracts appressed, scalelike (basalmost leaflike), awl-shaped, (concave when fresh), 3–4 mm, apex acute, surfaces glabrous. Pedicels 2–6 mm, glabrous. Flowers: corolla white to pink, urceolate; ovary canescent. Fruits globose, 6–8 mm diam., glabrous. Stones distinct. 2n = 26.


Phenology: Flowering winter–early spring.
Habitat: Maritime chaparral, serpentine soils
Elevation: 0-100 m

Discussion

Of conservation concern.

Formerly found in the northwestern portions of San Francisco, Arctostaphylos franciscana is now extirpated from the wild and survives only in cultivation.

Arctostaphylos franciscana is in the Center for Plant Conservation’s National Collection of Endangered Plants as A. hookeri subsp. franciscana.

Selected References

None.

Lower Taxa

None.

V. Thomas Parker +, Michael C. Vasey +  and Jon E. Keeley +
Eastwood +
0-100 m +
Maritime chaparral, serpentine soils +
Flowering winter–early spring. +
Bull. Torrey Bot. Club +
Endemic +  and Conservation concern +
Arctostaphylos hookeri subsp. franciscana +
Arctostaphylos franciscana +
Arctostaphylos +
species +