Difference between revisions of "Clematis occidentalis var. occidentalis"

Endemic
Synonyms: Atragene americana Sims Clematis verticillaris de Candolle Clematis verticillaris var. cacuminis B.Boivin Clematis verticillaris var. grandiflora
Treatment appears in FNA Volume 3.
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Revision as of 22:11, 16 December 2019

Stems ± viny, climbing or trailing, 0.25-3.5 m. Leaves: leaflets unlobed or occasionally 1-3-lobed, (2-)3-6(-10) cm, margins entire or shallowly crenate-serrate. Flowers: sepals remaining moderately divergent, reddish violet, ovate to oblong-elliptic, 2.5-6 cm, margins not fluted, tips rounded-mucronate to nearly acuminate. 2n = 16.


Phenology: Flowering spring.
Habitat: Calcareous cliffs, rock ledges, talus slopes, gravelly embankments, rocky woods, and clearings
Elevation: 0-1300 m

Distribution

V3 1148-distribution-map.gif

N.B., Ont., Que., Conn., Del., Ill., Iowa, Maine, Md., Mass., Mich., Minn., N.H., N.J., N.Y., N.C., Pa., R.I., Vt., Va., W.Va., Wis.

Discussion

Clematis occidentalis var. occidentalis formerly occurred in Ohio. Plants in the western part of the range of this variety tend to have larger, more abruptly tapering sepals; they have been segregated as var. grandiflora B.Boivin, but they do not appear to constitute a distinct taxon.

Selected References

None.

Lower Taxa

None.
James S. Pringle +
(Hornemann) de Candolle +
Atragene occidentalis +
N.B. +, Ont. +, Que. +, Conn. +, Del. +, Ill. +, Iowa +, Maine +, Md. +, Mass. +, Mich. +, Minn. +, N.H. +, N.J. +, N.Y. +, N.C. +, Pa. +, R.I. +, Vt. +, Va. +, W.Va. +  and Wis. +
0-1300 m +
Calcareous cliffs, rock ledges, talus slopes, gravelly embankments, rocky woods, and clearings +
Flowering spring. +
Atragene americana +, Clematis verticillaris +, Clematis verticillaris var. cacuminis +  and Clematis verticillaris var. grandiflora +
Clematis occidentalis var. occidentalis +
Clematis occidentalis +
variety +