Photo: Clematis columbiana.

Closeup of flowering branch. Cloudcroft, NM, US. Wild. 1998-06-01.
Clematis columbiana (Nutt.) Torr. & Gray Engl.: Rocky Mountain clematis, climbing purple virgin's bower, rock clematis, whorl-leaved virgin's bower. Bot. syn.: Atragene americana Sims., Atragene columbiana Nutt., Clematis pseudoalpina (Kuntze) A. Nels., Clematis verticillaris DC.
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Photo: Clematis columbiana.