Clematis occidentalis |
Clematis hirsutissima |
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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 |
Douglas' clematis, hairy clematis, leatherflower, sugar bowls, vaseflower |
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Stems | viny, climbing or trailing (plants scarcely viny perennials in var. dissecta). |
erect, not viny, 1.5-6.5 dm, hirsute (sometimes sparsely so in var. hirsutissima) or densely short, soft-pubescent to nearly 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 2-3-pinnate; leaflets often deeply 2-several-lobed, if lobed than lateral lobes usually small and distinctly narrower than central portion, leaflets or lobes linear to lanceolate, 1-6 × 0.05-1.5 cm, thin, not prominently reticulate; surfaces sparsely to densely silky-hirsute, not glaucous. |
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Inflorescences | terminal, flowers solitary. |
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Flowers | sepals violet-blue, reddish violet, or white, lanceolate to ovate or elliptic-oblong. |
broadly cylindric to urn-shaped; sepals very dark violet-blue or rarely pink or white, oblong-lanceolate, 2.5-4.5 cm, margins narrowly expanded distally, 0.5-2 mm wide, thin, distally ± crisped, tomentose, tips obtuse to acute, slightly spreading, abaxially usually densely hirsute, occasionally moderately so. |
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Achenes | bodies densely long-pubescent; beak 4-9 cm, plumose. |
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Clematis occidentalis |
Clematis hirsutissima |
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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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AZ; CO; ID; MT; NE; NM; OK; OR; SD; UT; WA; WY
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Discussion | Varieties 3 (3 in the flora). (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Varieties 2 (2 in the flora). The varieties of Clematis hirsutissima, although highly dissimilar in their extreme forms, intergrade extensively in Wyoming, Colorado, and Utah. (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 | Coriflora hirsutissima | ||||||||||||
Name authority | (Hornemann) de Candolle: Prodr. 1: 10. (1824) | Pursh: Fl. Amer. Sept. 2: 385. (1814) | ||||||||||||
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