Arctostaphylos sensitiva |
Ericaceae subfam. arbutoideae |
|
---|---|---|
coinleaf manzanita, dwarf manzanita, glossyleaf manzanita |
|
|
Habit | Shrubs, erect or mound-forming, 1–2 m; burl absent; bark on older stems red, smooth; twigs densely short-haired with longer gland-tipped hairs. | Shrubs or trees, multicellular hairs present or, sometimes, absent (Comarostaphylis); bark smooth, not furrowed, often flaky, sometimes shredding. |
Stems | erect or prostrate. |
|
Leaves | bifacial in stomatal distribution; petiole 1–3 mm; blade light green abaxially, dark green adaxially, shiny, orbiculate to orbiculate-ovate, 1–2.2 × 0.8–1.8 cm, base truncate to ± lobed, margins entire, cupped, surfaces smooth, glabrous, midvein hairy. |
persistent (deciduous in Arctous), usually alternate, sometimes opposite or whorled (Ornithostaphylos), rarely opposite (Xylococcus); petiole usually present, sometimes absent (Arctostaphylos); blade plane, abaxial groove absent. |
Inflorescences | panicles, 4–8-branched; immature inflorescence pendent, branches spreading, axis 0.5–1 cm, to 1 mm diam., densely short-hairy with longer gland-tipped hairs; bracts appressed, scalelike, deltate, 0.5–2 mm, apex acute, surfaces glabrous. |
terminal, panicles or racemes; perulae absent; bracts much shorter than sepals; bracteoles 2 or absent (Arctostaphylos, Arctous). |
Pedicels | 3–5 mm, glabrous. |
|
Flowers | 4-merous; corolla white to pink, urceolate; ovary white-hairy. |
pendulous; sepals (4-)5; petals (4-)5, connate, corolla deciduous, usually urceolate, sometimes cylindric, conic, or globose, lobes much shorter than tube; intrastaminal nectary disc present; stamens (8-)10; anthers dehiscent by slits or pores; ovary 2-10-locular; placentation axile; style straight. |
Fruits | subcylindric, 3–4 mm diam., glabrous. |
drupaceous (baccate in Arbutus), (pulp mealy or juicy), indehiscent; pyrenes 1-5, often connate into stonelike endocarp. |
Seeds | 1-10, usually distinct, sometimes connate, globose (sometimes 3-sided), not winged. |
|
Stones | distinct (breaking apart in mature fruit). |
|
2n | = 26. |
|
Arctostaphylos sensitiva |
Ericaceae subfam. arbutoideae |
|
Phenology | Flowering winter–early spring. | |
Habitat | Sandstone uplands in maritime chaparral or closed-cone conifer forests near coast | |
Elevation | 100-600 m (300-2000 ft) | |
Distribution |
CA
|
North America; Mexico; Central America; Europe; n Africa; n Atlantic Islands (Canary Islands); most species endemic to western North America |
Discussion | Of conservation concern. Arctostaphylos sensitiva occurs in Marin, San Mateo, and Santa Cruz counties. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Genera 6, species 91 or 92 (6 genera, 70 species in the flora). (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 8, p. 418. | FNA vol. 8, p. 397. |
Parent taxa | Ericaceae > subfam. Arbutoideae > Arctostaphylos | Ericaceae |
Sibling taxa | ||
Subordinate taxa | ||
Synonyms | A. nummularia subsp. sensitiva, A. nummularia var. sensitiva | tribe Arbuteae |
Name authority | Jepson: Madroño 1: 85. 1922 , | Niedenzu: Niedenzu, Bot. Jahrb. Syst. 11: 135. (1889) |
Web links |