Clematis occidentalis |
Clematis albicoma |
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blue clematis, clématite occidentale, Columbia bower, Columbia clematis, Columbia virgin's bower, purple clematis, purple virgin's-bower, rock clematis, western blue clematis, western blue virginsbower, western clematis |
erect mountain clematis, white-hair leather-flower |
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Stems | viny, climbing or trailing (plants scarcely viny perennials in var. dissecta). |
erect, not viny, 2-4(-6) dm, pubescent or pilose to ± tomentose or hirsute. |
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Leaves | blade 1-ternate (or terminal leaflet sometimes ternate in var. dissecta), ± firm but not succulent; leaflets lance-ovate to triangular or suborbiculate, lobed or unlobed, margins entire or toothed. |
blade elliptic-lanceolate to ovate, unlobed, 3.5-8(-10) × 1.5-5(-6.5) cm, thin, not conspicuously reticulate; surfaces abaxially glabrous to sparsely (rarely more densely) villous on veins, not glaucous. |
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Inflorescences | terminal, flowers solitary; bracts absent. |
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Flowers | sepals violet-blue, reddish violet, or white, lanceolate to ovate or elliptic-oblong. |
narrowly urn-shaped; sepals purplish, yellowish toward tips, oblong-lanceolate, (1.1-)1.4-3 cm, margins not expanded or less than 1 mm wide, thin, not crispate, tomentose, tips obtuse, spreading to recurved, abaxially silky- to woolly-pubescent. |
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Achenes | bodies pilose; beak white to pale yellow, (1.5-)2-4(-4.5) cm, plumose. |
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2n | = 16. |
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Clematis occidentalis |
Clematis albicoma |
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Phenology | Flowering spring–early summer. | |||||||||
Habitat | Shale barrens | |||||||||
Elevation | 300-800 m (1000-2600 ft) | |||||||||
Distribution |
CO; CT; DE; IA; ID; IL; MA; MD; ME; MI; MN; MT; NC; NH; NJ; NY; OR; PA; RI; UT; VA; VT; WA; WI; WV; WY; AB; BC; NB; ON; QC; SK; YT
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VA; WV |
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Discussion | Varieties 3 (3 in the flora). (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Clematis albicoma is known only from shale barrens predominantly developed from the Upper Devonian Brallier Formation in nine counties of western Virginia and adjacent West Virginia. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
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Key |
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Source | FNA vol. 3. | FNA vol. 3. | ||||||||
Parent taxa | Ranunculaceae > Clematis > subg. Atragene | Ranunculaceae > Clematis > subg. Viorna | ||||||||
Sibling taxa | ||||||||||
Subordinate taxa | ||||||||||
Synonyms | Atragene occidentalis | |||||||||
Name authority | (Hornemann) de Candolle: Prodr. 1: 10. (1824) | Wherry: J. Wash. Acad. Sci. 21: 198. (1931) | ||||||||
Web links |
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