Clematis occidentalis |
Clematis socialis |
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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 |
Alabama leather-flower |
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Stems | viny, climbing or trailing (plants scarcely viny perennials in var. dissecta). |
erect, not viny, 0.2-0.3(-0.5) m, glabrous or slightly pubescent, arising from horizontal, branching rhizomes and forming patches. |
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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. |
proximal simple, blades unlobed or 2-3-lobed, distal blades 1-pinnate; leaflets and unlobed blades linear-elliptic to narrowly lanceolate or oblanceolate, (3-)4-12(-15) × (0.3-)0.5-1(-1.5) cm, thin, not prominently reticulate; surfaces abaxially nearly glabrous to sparsely 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 uniformly violet-blue, oblong-lanceolate, 2-2.5(-3) cm, margins narrowly expanded distally to about 1 mm wide, thin, crispate, proximally tomentose, tips spreading to recurved, acute to acuminate, abaxially sparsely puberulent. |
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Achenes | bodies appressed-puberulent; beak 1.5-2.5 cm, appressed-puberulent. |
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Clematis occidentalis |
Clematis socialis |
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Phenology | Flowering spring–fall. | |||||||||
Habitat | Openings in wet bottomland woods | |||||||||
Elevation | 200 m (700 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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AL |
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Discussion | Varieties 3 (3 in the flora). (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Of conservation concern. Clematis socialis, the only species of Clematis subg. Viorna in the flora with horizontal, patch-forming rhizomes, is known only from three small populations in St. Clair and Cherokee counties south of Ashville, in northeastern Alabama. (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) | Kral: Rhodora 84: 287. (1982) | ||||||||
Web links |
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