Arctostaphylos densiflora

M. S. Baker

Leafl. W. Bot.1: 31. 1932 ,

Common names: Vine Hill manzanita
Found in FNA Volume 8. Treatment on page 419. Mentioned on page 412.
Shrubs, erect or mound-forming, ca. 1 m; burl absent; twigs sparsely short-hairy. Leaves: petiole 4–5 mm; blade bright green, lustrous, elliptic to narrowly lanceolate-elliptic, 1–2.5 × 0.5–1.5 cm, base cuneate to obtuse, margins entire, plane, surfaces smooth, sparsely puberulent. Inflorescences panicles, 3–5-branched; immature inflorescence pendent, (compact), branches ± spreading, axis 1–1.5 cm, 1+ mm diam., sparsely short-hairy; bracts not appressed, scalelike, deltate to awl-like, 1.5–3 mm (longer than buds), apex acute, surfaces glabrous. Pedicels 4–5 mm, glabrous. Flowers: corolla white, urceolate; ovary glabrous. Fruits subglobose, 5–6 mm diam., glabrous. Stones distinct. 2n = 26.

Phenology: Flowering winter–early spring.
Habitat: Acidic marine sands
Elevation: 100 m

Distribution

Calif.

Discussion

Of conservation concern.

Arctostaphylos densiflora is known only from Vine Hill, Sonoma County. It is the primary source of one of the most widely planted horticultural varieties of the genus (McMinn manzanita). It is in the Center for Plant Conservation’s National Collection of Endangered Plants.

References

None.

AuthorV. Thomas Parker +, Michael C. Vasey + and Jon E. Keeley +
Common nameVine Hill manzanita +
Elevation100 m +
HabitatAcidic marine sands +
IllustratorYevonn Wilson-Ramsey +
PhenologyFlowering winter–early spring. +
ReferenceNone +
Taxon nameArctostaphylos densiflora +
Taxon parentArctostaphylos +
Taxon rankspecies +
VolumeVolume 8 +