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 over Rosa in open along stream.Vine ca. 3 m long; petals white; fruit green, margin 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