Tropicals & Tender Perennials: Any ideas on which one this is?, 1 by ardesia

ardesia wrote:
Well, I do think it is P. Charlotte Corday. after we yanked the vine down I cut some of the tips with buds and put them in water. The first flower opened today and now that it is fully open it is white. One of the sites I checked said this one gets to 15', my vine was far longer than that, more like 30'. The tree it was in was at least 15" and this vine went round and round and across to other trees.