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14. Clematis occidentalis (Hornemann) de Candolle, Prodr. 1: 10. 1824.
Purple clematis, clématite occidentale
Atragene occidentalis Hornemann, Hort. Bot. Hafn. 2: 520. 1815
Stems viny, climbing or trailing (plants scarcely viny perennials in var. dissecta ). 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. Flowers: sepals violet-blue, reddish violet, or white, lanceolate to ovate or elliptic-oblong.
Varieties 3 (3 in the flora): North America.
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| 1 |
Leaflets lobed or unlobed, margins entire or crenate-serrate (or terminal leaflet sometimes ternate); stems tufted or, if viny, up to 0.5(–1.5) m. |
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14c var. dissecta |
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Leaflets unlobed or some 1–3-lobed, margins entire or shallowly serrate; stems ± viny, climbing or trailing, 0.25–3.5 m. |
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(2) |
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| 2 (1) |
Sepals reddish violet, rounded-mucronate to nearly acuminate. |
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14a var. occidentalis |
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Sepals violet-blue to pale blue, rarely white, usually distinctly acuminate. |
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14b var. grosseserrata |
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Lower Taxa
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