Show Lower Taxa
Difference between revisions of "Clematis subg. Atragene"
Fl. N. Amer. 1: 10. 1838.
Basionym: Undefined subg. Atragene Linnaeus
Treatment appears in FNA Volume 3. Mentioned on page 165.
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| − | --><span class="statement" id="st- | + | --><span class="statement" id="st-undefined" data-properties=""><b>Woody </b>vines or rhizomatous herbs with short, tufted stems. <b>Leaf</b> blade 1-3-ternate, lobed or unlobed, margins entire or coarsely serrate. <b>Inflorescences</b> terminal on short shoots or rarely terminal on long shoots, 1[-2]-flowered with bractless peduncles subtended by 1 or 2 pairs of leaves. <b>Flowers</b> bisexual, ± nodding; perianth widely bell-shaped to rotate; sepals ascending or tardily spreading, not connivent, usually violet-blue, sometimes reddish violet, or white, ovate to oblong, thin, margins densely pubescent, abaxially sparsely pubescent; staminodes present between stamens and sepals, flattened, petaloid, bearing reduced, sterile anthers; filaments flattened, pubescent at least on margins. <b>Achenes</b> flattened; beak over 2 cm, plumose.</span><!-- |
-->{{Treatment/Body | -->{{Treatment/Body | ||
| − | |distribution=Temperate to subarctic and subalpine North America and Eurasia | + | |distribution=Temperate to subarctic and subalpine North America and Eurasia. |
|discussion=<p>Species ca. 5 (2 in the flora).</p><!-- | |discussion=<p>Species ca. 5 (2 in the flora).</p><!-- | ||
--><p>F. B. Essig (1992) suggested that Clematis subg. Atragene might be included in Clematis subg. Clematis. Because of its distinctive inflorescence and floral morphology, however, and because it has not been successfully crossed with species in any other subgenus, its subgeneric status is retained here.</p><!-- | --><p>F. B. Essig (1992) suggested that Clematis subg. Atragene might be included in Clematis subg. Clematis. Because of its distinctive inflorescence and floral morphology, however, and because it has not been successfully crossed with species in any other subgenus, its subgeneric status is retained here.</p><!-- | ||
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|basionyms=Undefined subg. Atragene | |basionyms=Undefined subg. Atragene | ||
|family=Ranunculaceae | |family=Ranunculaceae | ||
| − | |distribution=Temperate to subarctic and subalpine North America and Eurasia | + | |distribution=Temperate to subarctic and subalpine North America and Eurasia. |
|reference=pringle1971a | |reference=pringle1971a | ||
|publication title=Fl. N. Amer. | |publication title=Fl. N. Amer. | ||
|publication year=1838 | |publication year=1838 | ||
|special status= | |special status= | ||
| − | |source xml=https://jpend@bitbucket.org/aafc-mbb/fna- | + | |source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/9216fc802291cd3df363fd52122300479582ede7/coarse_grained_fna_xml/V3/V3_670.xml |
|genus=Clematis | |genus=Clematis | ||
|subgenus=Clematis subg. Atragene | |subgenus=Clematis subg. Atragene | ||
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-->[[Category:Treatment]][[Category:Clematis]] | -->[[Category:Treatment]][[Category:Clematis]] | ||
Revision as of 14:46, 27 July 2019
Woody vines or rhizomatous herbs with short, tufted stems. Leaf blade 1-3-ternate, lobed or unlobed, margins entire or coarsely serrate. Inflorescences terminal on short shoots or rarely terminal on long shoots, 1[-2]-flowered with bractless peduncles subtended by 1 or 2 pairs of leaves. Flowers bisexual, ± nodding; perianth widely bell-shaped to rotate; sepals ascending or tardily spreading, not connivent, usually violet-blue, sometimes reddish violet, or white, ovate to oblong, thin, margins densely pubescent, abaxially sparsely pubescent; staminodes present between stamens and sepals, flattened, petaloid, bearing reduced, sterile anthers; filaments flattened, pubescent at least on margins. Achenes flattened; beak over 2 cm, plumose.
Distribution
Temperate to subarctic and subalpine North America and Eurasia.
Discussion
Species ca. 5 (2 in the flora).
F. B. Essig (1992) suggested that Clematis subg. Atragene might be included in Clematis subg. Clematis. Because of its distinctive inflorescence and floral morphology, however, and because it has not been successfully crossed with species in any other subgenus, its subgeneric status is retained here.
The two North American species have been known to hybridize in Montana.
Selected References
Lower Taxa
Key
| 1 | Leaf blade consistently 2–3-ternate. | Clematis columbiana |
| 1 | Leaf blade 1-ternate (or terminal leaflet sometimes ternate in var. dissecta). | Clematis occidentalis |