Arctostaphylos pacifica |
Arctostaphylos mewukka |
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Pacific manzanita |
Indian manzanita |
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Habit | Shrubs, prostrate or mound-forming, 0.1–0.3 m; burl present, sometimes epicormic; twigs short-hairy. | Shrubs, erect, 1–3 m; burl present or absent; twigs glabrous or slightly hairy and sparsely glandular. | ||||
Leaves | petiole 2–4 mm; blade light green abaxially, dark green adaxially, shiny, elliptic, 1–2 × 0.5–1 cm, base cuneate, margins serrulate, plane, surfaces smooth, sparsely hairy. |
petiole 6–15 mm; blade intensely gray- or white-glaucous, dull, orbiculate, orbiculate-ovate, oblong-ovate, or lanceolate-ovate, 3–7 × 2–7 cm, base rounded, margins entire, plane, apex acute or obtuse, surfaces smooth, glabrous. |
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Inflorescences | racemes, (simple or 1-branched); immature inflorescence pendent, (congested), axis 0.5–1 cm, 1+ mm diam., short-hairy; bracts appressed, scalelike, awl-like, 0.5–1 mm, apex acute, glabrous. |
panicles, 2–7-branched; immature inflorescence pendent, axis 2–3 cm, 1+ mm diam., glabrous or slightly hairy, sometimes glandular; bracts tightly appressed, scalelike, deltate to linear-lanceolate, 3–6 mm, apex acute or acuminate, surfaces glabrous. |
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Pedicels | 3–5 mm, glabrous. |
4–8 mm, glabrous. |
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Flowers | corolla white, urceolate; ovary glabrous. |
corolla white, conic to urceolate; ovary glabrous. |
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Fruits | (reddish), globose, 6–8 mm diam., glabrous. |
(dark mahogany-brown), globose, 12–16 mm diam., glabrous. |
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Stones | distinct. |
distinct, sometimes connate. |
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Arctostaphylos pacifica |
Arctostaphylos mewukka |
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Phenology | Flowering winter–early spring. | |||||
Habitat | Sandstone outcrops | |||||
Elevation | 300 m (1000 ft) | |||||
Distribution |
CA
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CA
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Discussion | Of conservation concern. A distinctive species with an uncertain origin, Arctostaphylos pacifica has often been relegated to hybrid status and ignored; it displays a number of unique characters not found in any other species. It is found only at one location, San Bruno Mountain, the northern part of the Santa Cruz Mountains, San Mateo County. The relationships of this species need additional study. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Subspecies 2 (2 in the flora). Arctostaphylos mewukka is found on the western slopes of the central and northern Sierra Nevada. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
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Key |
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Source | FNA vol. 8, p. 415. | FNA vol. 8, p. 421. | ||||
Parent taxa | Ericaceae > subfam. Arbutoideae > Arctostaphylos | Ericaceae > subfam. Arbutoideae > Arctostaphylos | ||||
Sibling taxa | ||||||
Subordinate taxa | ||||||
Name authority | Roof: Leafl. W. Bot. 9: 217. 1962 , | Merriam: Proc. Biol. Soc. Wash. 31: 101, plates 2, 3. 1918 , | ||||
Web links |