Clematis terniflora

de Candolle
Syst. Nat. 1: 137. 1817.
Common names: Sweet autumn clematis yam-leaved clematis
Introduced
Synonyms: Clematis dioscoreifolia H. Léveillé & Vaniot Clematis dioscoreifolia var. robusta (Carr) Rehder Clematis maximowicziana
Treatment appears in FNA Volume 3.

Stems climbing with tendril-like petioles and leaf rachises, 3-6 m. Leaf blade pinnately 3- or 5-foliolate; leaflets ovate or broadly lanceolate to narrowly deltate, to 6.5 × 3.5 cm, margins entire; surfaces abaxially glabrous or very sparingly appressed-strigose on major veins. Inflorescences axillary, 3-12-flowered cymes or compound cymes or paniculate with cymose subunits. Flowers bisexual, often some unisexual (staminate) in same inflorescence; pedicel 1-3.5 cm, slender; sepals wide-spreading, not recurved, white, linear or elliptic to lanceolate or narrowly obovate, 0.9-2.2 cm, length ca. 2-3 times width, abaxially tomentose along margins, adaxially glabrous; stamens ca. 50; filaments glabrous; staminodes absent; pistils 5-10. Achenes broad, flat, conspicuously rimmed, minutely appressed-silky, sometimes sparsely so; beak 2-6 cm.


Phenology: Flowering summer (Jul–Sep).
Habitat: Roadsides, thickets, and other secondary sites, edges of woods near creeks
Elevation: 0-1000 m

Distribution

V3 826-distribution-map.gif

Introduced; Ont., Ala., Ark., Conn., Fla., Ga., Ill., Ind., Kans., Ky., La., Md., Mass., Miss., Mo., Nebr., N.H., N.J., N.Y., N.C., Ohio, Okla., Pa., S.C., Tenn., Tex., Va., W.Va., native to Asia (China, Korea, Japan).

Discussion

Clematis terniflora is commonly cultivated as an ornamental. It is widely naturalized in the eastern United States. The name C. paniculata J. F. Gmelin was incorrectly used for this species by Thunberg in 1794.

Some authors have recognized two or more varieties in this species, correlated with their distribution in Asia, but in the study by H.Hara (1975), all of the varietal names were reduced to synonymy.

Selected References

None.

Lower Taxa

None.

... more about "Clematis terniflora"
James S. Pringle +
de Candolle +
Sweet autumn clematis +  and yam-leaved clematis +
Ont. +, Ala. +, Ark. +, Conn. +, Fla. +, Ga. +, Ill. +, Ind. +, Kans. +, Ky. +, La. +, Md. +, Mass. +, Miss. +, Mo. +, Nebr. +, N.H. +, N.J. +, N.Y. +, N.C. +, Ohio +, Okla. +, Pa. +, S.C. +, Tenn. +, Tex. +, Va. +, W.Va. +, native to Asia (China +, Korea +  and Japan). +
0-1000 m +
Roadsides, thickets, and other secondary sites, edges of woods near creeks +
Flowering summer (Jul–Sep). +
Introduced +
Clematis dioscoreifolia +, Clematis dioscoreifolia var. robusta +  and Clematis maximowicziana +
Clematis terniflora +
Clematis subg. Clematis +
species +