Clematis occidentalis |
Clematis glaucophylla |
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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 |
glaucous clematis, whiteleaf leather flower |
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Stems | viny, climbing or trailing (plants scarcely viny perennials in var. dissecta). |
viny, to 5 m, glabrous. |
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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-pinnate; leaflets 4-10 plus additional tendril-like terminal leaflet, proximal leaflets usually 3-lobed or 3-foliolate, distal leaflets usually unlobed, ovate, 3-10 × 2-7.5 cm, ± thin, not prominently reticulate adaxially; surfaces abaxially glabrous and glaucous. |
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Inflorescences | axillary, 1-3-flowered; bracts about 1/3 distance from base of peduncle. |
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Flowers | sepals violet-blue, reddish violet, or white, lanceolate to ovate or elliptic-oblong. |
ovoid; sepals deep rose-red to purplish red, ovate-lanceolate, 2-2.5 cm, margins not expanded, thick, not crispate, tomentose, tips long-acuminate, ± recurved, abaxially glabrous. |
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Achenes | bodies appressed-pubescent; beak 5-6 cm, plumose. |
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2n | = 16. |
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Clematis occidentalis |
Clematis glaucophylla |
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Phenology | Flowering spring–summer. | |||||||||
Habitat | Stream banks in rich, neutral to slightly acid soils | |||||||||
Elevation | 0-100 m (0-300 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; FL; GA; MS; OK
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Discussion | Varieties 3 (3 in the flora). (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Reports of Clematis glaucophylla from other southeastern states have been based on misidentified specimens (W. M. Dennis 1976). Recent reports of the species in Arkansas, Kentucky, Louisiana, and Virginia have not been confirmed. (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 glaucophylla | ||||||||
Name authority | (Hornemann) de Candolle: Prodr. 1: 10. (1824) | Small: Bull. Torrey Bot. Club 24: 337. (1897) | ||||||||
Web links |
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