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

17. Arctostaphylos insularis Greene ex Parry, Bull. Calif. Acad. Sci. 2: 494. 1887.

Island manzanita

Arctostaphylos insularis var. pubescens Eastwood

Shrubs, erect, (arborescent), 2-5 m; burl absent; (lower stems reddish with glaucous patches); twigs glabrous, sometimes sparsely short-hairy or sparsely glandular-hairy. Leaves bifacial in stomatal distribution; petiole 4-8 mm; blade bright green, lustrous, oblong-elliptic, 2.5-4.5 × 1-3 cm, base rounded, margins entire, ± cupped, surfaces smooth, glabrous. Inflorescences panicles, 5-10-branched; immature inflorescence pendent, branches spreading, ascending, or erect, axis 2-3 cm, 1+ mm diam., glabrous, sometimes sparsely short-hairy or sparsely glandular-hairy, (buds ± spread apart); bracts not appressed, scalelike, deltate, 1.5-3 mm, apex acute, surfaces finely glandular-hairy. Pedicels 6-9 mm, finely glandular-hairy. Flowers: corolla white, conic to urceolate; ovary glabrous or sparsely glandular-hairy. Fruits depressed-globose, 8-15 mm diam., sparsely hairy or glabrous. Stones distinct. 2n = 26.

Flowering winter-early spring. Island chaparral and woodlands; of conservation concern; 200-400 m; Calif.

Arctostaphylos insularis is known from Santa Cruz Island.


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