Arctostaphylos insularis |
Arctostaphylos pilosula |
|
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island manzanita |
La Panza manzanita, Santa Margarita manzanita |
|
Habit | Shrubs, erect, (arborescent), 2–5 m; burl absent; (lower stems reddish with glaucous patches); twigs glabrous, sometimes sparsely short-hairy or sparsely glandular-hairy. | Shrubs, erect, 1–5 m; burl absent; twigs short-hairy and hispid. |
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. |
petiole 4–8 mm; blade dark green to gray-glaucous, dull, narrowly elliptic to orbiculate-ovate, 1–3 × 1–2 cm, base cuneate or truncate to slightly lobed, margins entire, plane, 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. |
racemes, simple or 1-branched; immature inflorescence pendent, axis 1–2 cm, 1+ mm diam., short-hairy with long hairs; bracts not appressed, (green), leaflike, lanceolate, 8–15 mm, apex acute, surfaces long-hairy. |
Pedicels | 6–9 mm, finely glandular-hairy. |
2–5 mm, glabrous. |
Flowers | corolla white, conic to urceolate; ovary glabrous or sparsely glandular-hairy. |
corolla white to pink, urceolate; ovary glabrous. |
Fruits | depressed-globose, 8–15 mm diam., sparsely hairy or glabrous. |
depressed-globose, 8–10 mm diam., glabrous. |
Stones | distinct. |
distinct. |
2n | = 26. |
= 26. |
Arctostaphylos insularis |
Arctostaphylos pilosula |
|
Phenology | Flowering winter–early spring. | Flowering winter–early spring. |
Habitat | Island chaparral and woodlands | Chaparral, open forests |
Elevation | 200-400 m (700-1300 ft) | 0-1200 m (0-3900 ft) |
Distribution |
CA
|
CA
|
Discussion | Of conservation concern. Arctostaphylos insularis is known from Santa Cruz Island. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Of conservation concern. Arctostaphylos pilosula occurs in San Luis Obispo County and exhibits some variation in leaf shape and color, as well as indument. Plants at higher elevations and farther inland may reflect introgression with A. glauca. Some lower-elevation populations historically have been segregated as subsp. pismoensis or A. wellsii. Field observation suggests that there is a morphological cline between coastal and interior populations so that taxonomic distinctions between these populations are unwarranted. Further taxonomic analysis might help to resolve this situation. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 8, p. 422. | FNA vol. 8, p. 426. |
Parent taxa | Ericaceae > subfam. Arbutoideae > Arctostaphylos | Ericaceae > subfam. Arbutoideae > Arctostaphylos |
Sibling taxa | ||
Synonyms | A. insularis var. pubescens | A. pilosula subsp. pismoensis, A. wellsii |
Name authority | Greene ex Parry: Bull. Calif. Acad. Sci. 2: 494. 1887 , | Jepson & Wieslander: Erythea 8: 101. 1938 , |
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