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FNA | Family List | FNA Vol. 8 | Ericaceae | Arctostaphylos

23. Arctostaphylos nissenana Merriam, Proc. Biol. Soc. Wash. 31: 102, plates 4, 5. 1918.

Nissenan manzanita

Shrubs, erect or mound-forming, 0.2-1.5 m; burl absent; bark on older stems persistent, gray, shredded; twigs short soft-hairy. Leaves: petiole 1-3 mm; blade gray-glaucous, dull, elliptic to oblong-elliptic, 1-2 × 0.8-1.5 cm, base cuneate to rounded, margins entire, plane, surfaces smooth, sparsely appressed-puberulent, glabrescent. Inflorescences racemes, simple or 1-branched; immature inflorescence pendent, (framed by leafy bracts), axis 0.2-0.5 cm, 1+ mm diam., short soft-hairy; bracts not appressed, narrowly leaflike, lanceolate, 3-5 mm, apex acute, surfaces glabrous or sparsely hairy. Pedicels 5-7 mm, sparsely hairy or glabrous. Flowers: corolla white, urceolate; ovary white-hairy. Fruits subglobose, 3-4 mm diam., glabrous. Stones distinct. 2n = 26.

Flowering winter-early spring. Shallow shale soils in chaparral and foothill woodlands; of conservation concern; 500-1200 m; Calif.

Arctostaphylos nissenana occurs in the western Sierra Nevada in El Dorado, Placer, and Tuolumne counties.


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