Climbing or prostrate shrub. Leaves ternate, with long petioles, leaflets ovate-lanceolate to lanceolate, acuminate, serrate, pubescent along the veins. Flowers solitary on ± long peduncles. Sepals 30-50 mm long, ovate-lanceolate to lanceolate or linear-lanceolate, yellowish-white to white, pubescent outside and along margins. Staminodes petaloid, flat, pubescent, the outer ones widened and tru ncate at apex, 1/2 to 1/3rd the length of the sepals, equalling the stamens. Filaments covered with long hairs, flattened. Achenes ± laterally compressed, styles long, plumose, ciliate.

Lectotype: “Habitate in Siberae subhumidis ubique, Hb. Linn. 711/7 (IDC Micro Edition 363 Gotlandix).

Distribution: From Karelia (European SSR.) through Siberia and S.E. to Mongolia, Tien-Shan, Pamir.

Mentioned by Stewart from Chitral, Gilgit, Baltistan. I did not see any specimen from Pakistan or Kashmir. The name may have been applied erroneously to Clematis robertsiana Aitch. & Hemsl. or untypical specimens of Clematis Montana Buch. -Ham.