Subfamily CYPRIPEDIOIDEAE : Contains 4 Tribes, 5 subtribes and 6 genera with about 115 species which are mostly terrestrials or lithophytes. They lack pseudobulbs and show a unique shieldlike staminode and pouchlike lip.

Tribe: Cypripedieae

Subtribe: Cypripediinae

Genus: Cypripedium Lindl. , included (now synonyms) Arietinum Beck, Calceolaria Heist. ex Fabr., Calceolus Nieuwl., Ciripedium Zumagl., Criogenes Salisb., Fissipes Small, Hypodema Rchb., Sacodon Raf., Schizopedium Salisb., Stimegas Raf.

Subtribe: Paphiopedilinae

Genus: Paphiopedilum Pfitzer, included (now synonyms) Cordula Raf. and Menephora Raf.

Tribe: Mexipedieae

Subtribe: Mexipediinae

Genus: Mexipedium V.A.Albert & M.W.Chase

Tribe: Phragmipedieae

Subtribe: Phragmipediinae

Genus: Phragmipedium Rolfe, included (now synonyms) Phragmopedilum Pfitzer, Uropedium Lindl.

Tribe: Selenipedieae

Subtribe: Selenipediinae

Genus: Selenipedium Rchb.f.

Tribe: Others

Genus: Phragmipaphium Hort.

Hybrid formula: Paphiopedilum × Phragmipedium

Adapted from http://en.wikipedia.org/wiki/Taxonomy_of_the_Orchidaceae#Subfamily_Cypripedioideae