Clematis texensis |
Clematis occidentalis |
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crimson clematis, scarlet clematis, scarlet leather flower, Texas clematis |
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 |
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Stems | viny, to 3 m, glabrous or sometimes ± hirsute near nodes. |
viny, climbing or trailing (plants scarcely viny perennials in var. dissecta). |
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Leaf | blade 1-pinnate; leaflets 6-10 plus additional tendril-like terminal leaflet, ovate to nearly round, unlobed, 2-3-lobed, or most proximal occasionally 3-foliolate, 1-9 × 1-6 cm, leathery, ± prominently reticulate adaxially; surfaces abaxially usually glabrous, occasionally sparsely pubescent, glaucous. |
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, 1-7-flowered. |
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Flowers | ovoid to urn-shaped; sepals rose-red to scarlet abaxially and at tip adaxially, ovate-lanceolate, 1.5-3 cm, margins not expanded, thick, not crispate, tomentose, tips acute to acuminate, recurved, abaxially glabrous. |
sepals violet-blue, reddish violet, or white, lanceolate to ovate or elliptic-oblong. |
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Achenes | bodies appressed-pubescent; beak 4-7 cm, plumose. |
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2n | = 16. |
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Clematis texensis |
Clematis occidentalis |
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Phenology | Flowering spring–summer (Mar–Jun). | |||||||||
Habitat | Woodlands, calcareous cliffs, and stream banks | |||||||||
Elevation | 80-700 m (300-2300 ft) | |||||||||
Distribution |
TX
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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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Discussion | Although widely cultivated because it is the only species of Clematis with truly red flowers, C.texensis is native only to the southeastern part of the Edwards Plateau, Texas. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
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. Viorna | Ranunculaceae > Clematis > subg. Atragene | ||||||||
Sibling taxa | ||||||||||
Subordinate taxa | ||||||||||
Synonyms | Viorna coccinea | Atragene occidentalis | ||||||||
Name authority | Buckley: Proc. Acad. Nat. Sci. Philadelphia 13: 448. (1862) | (Hornemann) de Candolle: Prodr. 1: 10. (1824) | ||||||||
Web links |
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