Sichuan: Rangtang (Zamtang) Xian.
N of the city of Rangtang (Zamtang) on road into Qinghai Province, then along the Maerqu He (Maerqu River) on Sichuan side of river.
Remnant forest of Abies, Picea, Betula, Salix and Prunus on slopes above river; Salix immediately along river
32°40'21"N,
101°6'27"E;
3075-3525 m.
Moist slope above river in shade.Colonial; petals white Some plants infected with Puccinia.
D. E. Boufford, K. Fujikawa, S. L. Kelley, R. H. Ree, B. Xu, D. C. Zhang, J. W. Zhang, T. C. Zhang, W. D. Zhu