Arctostaphylos imbricata |
Arctostaphylos viscida |
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San Bruno Mountain manzanita |
sticky manzanita, sticky whiteleaf manzanita, white-leaf manzanita |
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Habit | Shrubs, prostrate or mat- or mound-forming, 0.1–1 m; burl absent; twigs densely fine-hairy with long, gland-tipped hairs. | Shrubs, erect, 1–3 m; burl absent; twigs glabrous, sparsely short-hairy, or densely glandular-hairy. | ||||||||
Leaves | petiole to 2 mm; blade light green, dull, orbiculate to orbiculate-ovate, 2.5–4 × 2–3 cm, base auriculate-clasping, margins entire, plane, surfaces papillate, ± scabrous, sparsely glandular-hairy. |
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. |
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Inflorescences | panicles, 3–5-branched; immature inflorescence pendent, (branches densely clustered, ± sessile), axis 0.5–1 cm, 1+ mm diam., densely fine-hairy with long, gland-tipped hairs; bracts appressed, leaflike, ovate, 5–10 mm, apex acute, surfaces glandular-hairy. |
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. |
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Pedicels | 3–5 mm, densely glandular-hairy. |
6–10 mm, finely to densely glandular-hairy. |
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Flowers | corolla white, urceolate; ovary densely glandular-hairy. |
corolla white, conic to urceolate; ovary glabrous or glandular-hairy. |
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Fruits | depressed-globose, 6–7 mm diam., glandular-hairy, (± viscid). |
depressed-globose, 6–8 mm diam., glabrous or sparsely to densely glandular-hairy, (sometimes viscid). |
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Stones | distinct. |
distinct. |
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2n | = 26. |
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Arctostaphylos imbricata |
Arctostaphylos viscida |
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Phenology | Flowering winter–early spring. | |||||||||
Habitat | Maritime chaparral on sandstone outcroppings | |||||||||
Elevation | 100-200 m (300-700 ft) | |||||||||
Distribution |
CA
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CA; OR
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Discussion | Of conservation concern. Arctostaphylos imbricata occurs on San Bruno Mountain in San Mateo County. It is in the Center for Plant Conservation’s National Collection of Endangered Plants. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Subspecies 3 (3 in the flora). 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. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
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Key |
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Source | FNA vol. 8, p. 435. | FNA vol. 8, p. 423. | ||||||||
Parent taxa | Ericaceae > subfam. Arbutoideae > Arctostaphylos | Ericaceae > subfam. Arbutoideae > Arctostaphylos | ||||||||
Sibling taxa | ||||||||||
Subordinate taxa | ||||||||||
Synonyms | A. andersonii var. imbricata | |||||||||
Name authority | Eastwood: Proc. Calif. Acad. Sci., ser. 4, 20: 149. 1931 , | Parry: Bull. Calif. Acad. Sci. 2: 492. 1887 , | ||||||||
Web links |