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

19. Arctostaphylos viscida Parry, Bull. Calif. Acad. Sci. 2: 492. 1887.

Sticky whiteleaf manzanita

Shrubs, erect, 1-3 m; burl absent; twigs glabrous, sparsely short-hairy, or densely glandular-hairy. Leaves: petiole 5-12 mm; blade white-glaucous, dull, ovate to ± orbiculate, 2-5 × 2-4 cm, base rounded, truncate, or ± lobed, margins entire or ciliate, plane, surfaces smooth-papillate, rough, scabrous, glabrous or sparsely puberulent. Inflorescences panicles, 4-7-branched; immature inflorescence pendent or ascending, branches spreading, axis 1-3 cm, 1+ mm diam., densely glandular, (sticky); bracts appressed, (glaucous), scalelike, deltate, 3-4 mm, apex acute to acuminate, surfaces viscid-glandular (rarely minutely stipitate-glandular) or glandular-hairy, especially along margins. Pedicels 6-10 mm, finely to densely glandular-hairy. Flowers: corolla white, conic to urceolate; ovary glabrous or glandular-hairy. Fruits depressed-globose, 6-8 mm diam., glabrous or sparsely to densely glandular-hairy, (sometimes viscid). Stones distinct.

Subspecies 3 (3 in the flora): w United States.

Arctostaphylos viscida is distributed widely in the Sierra Nevada and northern Coast Ranges of California and the Cascade Mountains in southern Oregon. The subspecies occasionally occur in mixed populations, especially subspp. viscida and mariposa.

1 Twigs densely glandular-hairy; leaf blades sparsely short glandular-hairy.   19c Arctostaphylos viscida subsp. mariposa
+ Twigs and leaf blades glabrous (except sometimes near inflorescence)   (2)
2 (1) Ovaries and fruits smooth, glabrous, not viscid.   19a Arctostaphylos viscida subsp. viscida
+ Ovaries and fruits rough, densely glandular, viscid.   19b Arctostaphylos viscida subsp. pulchella

Lower Taxa


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