Clematis occidentalis |
Clematis crispa |
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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 |
blue-jasmine, curly clematis, curly virginsbower, marsh clematis, swamp leather flower |
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Stems | viny, climbing or trailing (plants scarcely viny perennials in var. dissecta). |
viny, to 3 m, glabrous or sparsely to moderately pilose-pubescent, denser at nodes. |
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Leaf | 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 1-2-pinnate or rarely a few simple or 3-foliolate; leaflets 4-10 plus additional ± tendril-like terminal leaflet, usually lanceolate to ovate, occasionally linear, unlobed or proximally 3-5-lobed, (1.5-)3-10 × (0.1-)0.4-4(-5) cm, thin, not conspicuously reticulate; surfaces glabrous, not glaucous. |
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Inflorescences | terminal, 1-flowered; bracts absent. |
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Flowers | sepals violet-blue, reddish violet, or white, lanceolate to ovate or elliptic-oblong. |
bell-shaped; sepals distally strongly spreading to recurved, violet-blue, lanceolate, 2.5-5 cm, margins proximally thick and tomentose, distally broadly expanded, 2-6 mm wide, thin, crispate, less conspicuously tomentose than proximal portion, or glabrate, tips acuminate, abaxially glabrous. |
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Achenes | bodies appressed-puberulent; beak 2-3.5 cm, appressed-puberulent. |
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2n | = 16. |
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Clematis occidentalis |
Clematis crispa |
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Phenology | Flowering spring–summer. | |||||||||
Habitat | Low woods, bottomlands, swamps | |||||||||
Elevation | 0-200 m (0-700 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; AR; FL; GA; IL; KY; LA; MO; MS; NC; OK; SC; TN; TX; VA
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Discussion | Varieties 3 (3 in the flora). (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Clematis crispa is highly variable in leaflet width, and conspicuous variation may occur on a single plant (R.O. Erickson 1943); no discontinuity or geographic correlation exists that would permit the recognition of varieties. The dilated, petaloid sepal tips and thin, crispate, broadly expanded sepal margins are diagnostic for this species. (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 | Viorna crispa, Viorna obliqua | ||||||||
Name authority | (Hornemann) de Candolle: Prodr. 1: 10. (1824) | Linnaeus: Sp. Pl. 1: 543. (1753) | ||||||||
Web links |
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