In this paper 20 species collected by Joseph F.Rock from southeastern Xizang(Tibet)

northwestern Yunnan and southwestern Sichuan of China in April-October 1932 are reported。Among them 14 species belong to Liliaceae

2 Iridaceae

1 Orchidaceae

1 Zingiberaceae

2 Gen-tianaceae and 1 Compesitae of which 3 new taxa are proposed

namely Lilium Rockii Miau sp.nov.

Roscorea sichuanensis Miau sp.nov

Swertia tetragona Miau sp.nov

they are maifilydescribed and but then other species follow after them as an enumeration in this paper。