Urophysa Ulbr.,a newly recorded genus of Ranunculaceae from Guangxi,China is reported. This genus is endemic to China,its original distribution is in eastern Sichuan,Guizhou,western Hubei,northern Hunan and Guangdong. Discovering this genus from Mulun National Nature Reserve indicates extensive relationship among subtropical karst floras. Detailed morphological description and field photos of U. henryi( Oliv.) Ulbr. are provided.
尾囊草属(Urophysa Ulbr.)位于毛茛科(Ranun-植物志27:488-489,图版115:6-12.1979;Fuculaceae)唐松草亚科(subfam.Thalictroideae)耧斗Dezhi in Flora of China 6:277.2001.——Isopyrum菜族(trib.Isopyreae),与天葵属(Semiaquilegia)和耧henryi Oliv.in Hook.Ic.Pl.8:t.1745.1