Frangula purshiana |
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bearberry, buckthorn, cascara, cascara buckthorn, cascara sagrada, false buckthorn |
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Habit | Shrubs or trees, 1–12 m. | ||||||||
Stems | red to brown, gray, or green, glabrous or densely hairy. |
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Leaves | deciduous or semideciduous, alternate; petiole 6–23 mm; blade usually pale green abaxially, green to bluish or greenish gray adaxially, not glaucous or glaucous when fresh, elliptic to oblong or oblong-obovate, (3.5–)5–15 cm, herbaceous or distinctly coriaceous, base rounded to subcordate, obtuse, or cuneate, margins entire, irregularly toothed, or serrulate, apex obtuse or truncate, both surfaces glabrous or sparsely to densely hairy, or adaxial velvety; secondary veins 9–11 pairs. |
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Inflorescences | umbels, pedunculate, 10–25-flowered. |
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Pedicels | 5–15 mm. |
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Drupes | black, globose to depressed-globose, 5–10 mm; stones 3. |
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Stigmas | 2–3-lobed. |
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Frangula purshiana |
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Distribution |
CA; ID; MT; OR; WA; BC
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Discussion | Subspecies 3 (3 in the flora). (Discussion copyrighted by Flora of North America; reprinted with permission.) |
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Key |
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Source | FNA vol. 12, p. 57. | ||||||||
Parent taxa | Rhamnaceae > Frangula | ||||||||
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Synonyms | Rhamnus purshiana | ||||||||
Name authority | (de Candolle) A. Gray ex J. G. Cooper: Trans. Amer. Med. Assoc. 10: 228. (1857) | ||||||||
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