Abstract: In addition to describing a new species, Cypripedium wumengense, as well as a new variety, C. bardolphianum var. zhongdianense, nomenclatural and taxonomic notes are made on its allies and the division to which they belong. They are ltrge]y found in the Hengduan Mountains in southwestern China, characterized by the absence of bract, havirg lip more or less covered with small wart-like outgrowths, and that as the capsule matures the scape becomes much elongated. Six species of this group have hitherto been reported, of which, however, C. ebracteatum and C. nutans are regarded here as conspecific with C. fargesii and C. bardolphianum respectively. Thus, including the new taxa described here, it composes five species and one variety: C. bardolphianum W. W. Sm. et Farrer (var. bardolphianum and var. zhongdianense S. C. Chen), C. micranthum Franch., C. fargesii Franch., C. margaritaceum Franch. and C. wumengense S. C. Chen. They are all grouped here into the same section, Sect. Trigonopedium (Franch.) Pfitz., the oldest legitimate name of this group in the rank of section.

Key words: Cypripedium wumengense, C.bardolphianum, C.bardolphianum var.zhongdianense, C.micranthum, C.margaritaceum, C.fargesii, Sect.Trigonopedium.