Xizang (Tibet): Baxoi Xian.
WSW of the village of Bangda on road (highway 318) to Bomi (Pome).
Steep, gravely slope on S side of pass and grass-Kobresia meadow at crest of limestone ridge with shrubs of Potentilla, Sibiraea, Rhododendron and Salix.
30°9'32"N,
97°18'56"E;
4650-4760 m.
Around shrubs on ridge crest at 4760 m.Infecting Draba altaica (C. A. Meyer) Bunge (Brassicaceae). Plants scattered; flowers white.
David E. Boufford, Susan L. Kelley, Richard H. Ree & Su-Gong WU (S. K. WU)