; Sp. Pl. 2: 951 (1753)
Distribution: Temperate Europe (1), North America south to Honduras, Russia (5), E-Asia and China (many), S-Himalaya [46 species and 7 hybrids listed, excluding garden hybrids]
= Arietinum L.C.Beck; Bot. North. Middle States: 352 (1833)
= Calceolaria Heist. ex Fabr.; Enum. Meth. Pl., ed. 2, 37 (1763)
= Calceolus Mill.; Gard. Dict. Abridg. Ed. 4 (1754)
= Ciripedium Zumagl.; Fl. Pedem. 1: 18 (1829)
= Criogenes Salisb.; Monthly Rev. 75: 81 (1814)
= Criosanthes Raf.; Amer. Monthly Mag. & Crit. Rev. 2: 268 (1818)
= Cypripedilon Rouy; J. Bot. (Morot) 8: 58 (1894), nom. superfl.
= Fissipes Small; Fl. S. E. U. S. 311 (1903)
= Hypodema Rchb.; Deut. Bot. Herb.-Buch: 56 (1841)
= Sacodon Raf.; Fl. Tellur. 4: 45 (1836)
= Schizopedium Salisb.; Monthly Rev. 75: 81 (1814)