Clematis baldwinii |
Clematis occidentalis |
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pine-hyacinth, pine-woods 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 | erect, 2-6 dm, nearly glabrous to moderately pilose. |
viny, climbing or trailing (plants scarcely viny perennials in var. dissecta). |
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Leaves | blade unlobed or 2-3-lobed, occasionally divided into 3-5 leaflets; leaflet blades or lobes linear to narrowly elliptic-lanceolate, or unlobed leaf blades elliptic to ovate, 1.5-10 × 0.2-2.5(-3.5) cm, thin, not prominently reticulate; surfaces glabrous, not 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 | terminal, flowers solitary; bracts absent or sometimes distal pair of leaves smaller, bractlike. |
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Flowers | narrowly bell-shaped; sepals uniformly violet-blue, oblong-lanceolate, 2-5.5 cm, margins narrowly expanded distally to ca. 1 mm wide, thin, crispate, proximally tomentose, glabrous where expanded, distally ± tomentose, tips acuminate, spreading to recurved, abaxially glabrous. |
sepals violet-blue, reddish violet, or white, lanceolate to ovate or elliptic-oblong. |
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Achenes | bodies long-pubescent; beak 6-10 cm, plumose. |
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2n | = 16. |
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Clematis baldwinii |
Clematis occidentalis |
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Phenology | Flowering all year. | |||||||||
Habitat | Sandy, flat pine woods | |||||||||
Elevation | 0-50 m (0-200 ft) | |||||||||
Distribution |
FL
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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 | The long peduncles (10-30 cm) elevating the flowers well above the leaves are unique to Clematis baldwinii among the simple-leaved species of Clematis subg. Viorna in the flora. Broad-leaved, large-flowered plants have been segregated as C. baldwinii var. latiuscula, but many intermediates connect the extremes, and flower size is not well correlated with leaf shape. As noted by C. S. Keener (1975), leaf shape appears to be uncorrelated with distribution; collections from a single population often include broad- and narrow-leaved plants. (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 | C. baldwinii var. latiuscula, Viorna baldwinii | Atragene occidentalis | ||||||||
Name authority | Torrey & A. Gray: Fl. N. Amer. 1: 8. (1838) | (Hornemann) de Candolle: Prodr. 1: 10. (1824) | ||||||||
Web links |
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