Clematis occidentalis |
Clematis catesbyana |
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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 |
satincurls, virgin's-bower |
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Stems | viny, climbing or trailing (plants scarcely viny perennials in var. dissecta). |
climbing, 3-6 m. Leaf blade pinnate or 2-ternate, 5-9-foliolate, membranous; leaflets ovate to lanceolate, largest 4-9 × 2.5-9 cm, surfaces abaxially sparsely to densely pilose, adaxially glabrate; proximal and lateral leaflets typically 3-cleft, unlobed or few-lobed, margins coarsely toothed or entire, surfaces sparsely pubescent or nearly glabrous; ultimate venation conspicuous. |
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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. |
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Inflorescences | axillary, 3-many-flowered simple to compound panicles with central axis. |
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Flowers | sepals violet-blue, reddish violet, or white, lanceolate to ovate or elliptic-oblong. |
unisexual; pedicel slender, 11-13 mm, to 2 cm in fruit; sepals wide-spreading, not recurved, white to cream, oblong or obovate to oblanceolate, 6-14 × 2-5 mm, abaxially densely white-hairy, adaxially sparsely white-hairy; stamens ca. 30-50; staminodes absent or fewer than stamens; pistils 18-35. |
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Achenes | ovate, ca. 3.5 × 1.5 mm, conspicuously rimmed, sparsely short hairy; beak 2.5-3.5 cm. |
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Clematis occidentalis |
Clematis catesbyana |
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Phenology | Flowering spring–summer (May–Jul). | |||||||||
Habitat | Disturbed or open, well-drained sites, frequently on limestone outcrops, coastal sands | |||||||||
Elevation | 0-1200 m (0-3900 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; KS; KY; LA; MO; MS; NC; OK; SC; TN; VA; WV |
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Discussion | Varieties 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. 3. | FNA vol. 3. | ||||||||
Parent taxa | Ranunculaceae > Clematis > subg. Atragene | Ranunculaceae > Clematis > subg. Clematis | ||||||||
Sibling taxa | ||||||||||
Subordinate taxa | ||||||||||
Synonyms | Atragene occidentalis | C. cordata, C. micrantha | ||||||||
Name authority | (Hornemann) de Candolle: Prodr. 1: 10. (1824) | Pursh: Fl. Amer. Sept. 2: 736. (1814) | ||||||||
Web links |
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