Clematis roylei Rehder, J. Arnold Arbor. 22: 575 1941. (Syn: Clematis nutans Royle [Illegitimate]);
Common name: Royle’s Clematis
India (Himachal Pradesh, Uttar Pradesh, Bihar, Madhya Pradesh, Orissa, Andhra
Pradesh), Nepal, Myanmar [Burma] (Kachin, Chin) as per Catalogue of Life;
India: Shaded places in forests along banks of rivers or streams, 500 – 2200 m. Himachal Pradesh, Uttar Pradesh, Bihar, Madhya Pradesh, Orissa and Andhra Pradesh; Nepal as per BSI Flora of India;
Clematis buchananiana DC. ?? : 6 posts by 2 authors. Attachments (6) – around 800 kb each.
Location: Chautara, Nepal
Date: 18 December 2017
Altitude: 4800 ft.
Habit : Wild
To me looks different from images at Clematis buchananiana
To me it seems to be Clematis roylei.
Please refer FLOWERS OF THE HIMALAYA by Oleg Polunin and Adam Stainton.
Plate-9, 70. That image was taken at Dolpo, Western Nepal.
This is Clematis royelii of Ranunculceae.
Thank you all ! Clematis roylei Rehder
Catalogue of Life The Plant List Ver.1.1 IPNI