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-foliolate 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 widespreading, 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), native to Asia (Korea), native to Asia (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.

"thin" is not a number.

... more about "Clematis terniflora"
appressed-silky +
terete +  and flattened +
James S. Pringle +
de Candolle +
cuneate +, truncate +  and cordate +
curved +  and straight +
plumose +
2 cm20 mm <br />0.02 m <br /> (6 cm60 mm <br />0.06 m <br />) +
scale-like;leaflike +
globose;cylindric +
Sweet autumn clematis +  and yam-leaved clematis +
compound +  and 3-12-flowered +
0 cm0 mm <br />0 m <br /> (15 cm150 mm <br />0.15 m <br />) +
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) +, native to Asia (Korea) +  and native to Asia (Japan) +
0-1000 m +
staminate +, pistillate +  and bracteate +
paired +  and solitary +
nodding +  and not nodding +
showy +  and inconspicuous +
unisexual +  and bisexual +
0 cm0 mm <br />0 m <br /> (15 cm150 mm <br />0.15 m <br />) +
sessile +  and aggregate +
flattened-ellipsoid;terete;flattened-ellipsoid;terete;lenticular +
Roadsides, thickets, and other secondary sites, edges of woods near creeks +
axillary +  and terminal +
5-foliolate +  and 3-foliolate +
petiolate +, sessile +, compound +  and simple +
cordate +  and orbiculate oblong lanceolate or oblanceolate lobed or unlobed +
0 cm0 mm <br />0 m <br /> (6.5 cm65 mm <br />0.065 m <br />) +
broadly lanceolate +  and narrowly deltate +
0 cm0 mm <br />0 m <br /> (3.5 cm35 mm <br />0.035 m <br />) +
palmate +  and pinnate +
toothed;entire +
paired +  and solitary +
0 cm0 mm <br />0 m <br /> (15 cm150 mm <br />0.15 m <br />) +
1 cm10 mm <br />0.01 m <br /> (3.5 cm35 mm <br />0.035 m <br />) +
distinct +
conspicuous +
spurred +, funnel--shaped +, cup-shaped +  and plane +
reduced +
Flowering summer (Jul–Sep). +
rudimentary +
5 +  and 10 +
not arillate +  and stalked +
not connivent +
elliptic to lanceolate or narrowly obovate +  and linear +
not persistent +
distinct +
not recurved +  and widespreading +
glabrous +  and tomentose +
3 +  and 6 +
obovate +, oblanceolate +, ovate +, lanceolate +, elliptic +, oblong +  and linear +
0.9 cm9 mm <br />0.009 m <br /> (2.2 cm22 mm <br />0.022 m <br />) +
Introduced +
yellow-flowered +
300 cm3,000 mm <br />3 m <br /> (600 cm6,000 mm <br />6 m <br />) +
persistent +
appressed-strigose;glabrous +
Clematis dioscoreifolia +, Clematis dioscoreifolia var. robusta +  and Clematis maximowicziana +
Clematis terniflora +
Clematis subg. Clematis +
species +
annual +  and perennial +