Sichuan: Maerkang (Barkam) Xian.
SE of the city of Maerkang on highway 317, then on highway 211 to Dangba, village of Yinliang Cun.
Thickets and open heavily grazed areas along stream and adjacent slopes with remnant forest with Acer, Betula, Fraxinus, Populus, Salix, Taxus and Pinus.
31°43'52"N,
102°4'19"E;
2365-2870 m.
Climbing on various shrubs in thickets along steam and on open slope.Vine ca. 5 m long; flowers creamy white.
David E. Boufford, Kazumi FUJIKAWA, Susan L. Kelley, Richard H. Ree, Bo XU, Dacai ZHANG, Jian-Wen ZHANG, Ti-Cao ZHANG & Wei-Dong ZHU