58 species illustrated with 56 water-colour plates; 71 line drawings and 15 distribution maps are included. Morphology, anatomy and cytology of Paphiopedilum are discussed, as well as the distribution, evolution and pollination of the genus. Hybridisation is covered and there are extensive notes on cultivation by Joyce Stewart. Includes discussion of the infrageneric classification and the species concept. A key is provided, enabling all 60 species to be identified. Each species account includes a full description, botanical varieties where relevant, taxonomic relationships, important synonyms, misidentifications, citation of types and justification of any name changes. Geographical distribution & cultivation requirements are noted.