Xizang (Tibet): Mangkang (Markam) Xian.
Between Mangkang and the Jinsha Jiang on highway 318, along the Xi Qu (Xi River).
Cut over remnant Picea forest on slope with scattered shrubs of Betula, Caragana, Cotoneaster and Rosa.
29°44'28"N,
98°40'51"E;
3600-3650 m.
On slope among shrubs.Petals white.
David E. Boufford, Bruce Bartholomew, Deren A. Eaton, Xin-Hui LI, Richard H. Ree, Bo XU, Ji-Pei YUE, Jian-Wen ZHANG & Xin-Xin ZHU