Sichuan: Maerkang (Barkam) Xian.
E of the city of Maerkang on road to Li Xian, then S on a dirt road to Maomuchu Cun.
Along stream and adjacent slopes with remnant forests of Picea and Betula with Hippophaƫ, Rosa, Cotoneaster and Hypericum.
31°47'57"N,
102°28'57"E;
3165 m.
Roadside and in gaps in forest in sun and shade.Plants to 1.5 m tall; petals creamy white; fruit immature, green.
David E. Boufford, Kazumi FUJIKAWA, Susan L. Kelley, Richard H. Ree, Bo XU, Dacai ZHANG, Jian-Wen ZHANG, Ti-Cao ZHANG & Wei-Dong ZHU