Michael Foley's authoritative text provides a full description of every species (plus 60 variants and hybrids) along with distribution maps. These are accompanied by Sidney Clarke's stunning plant portraits and habitat photos, taken in the course of a decade of orchid-hunting. Chapters on orchid biology and ecology, conservation and cultivation complete the picture. In addition, Sid Clarke, former principal photographer at the Garden, discloses the secrets of his art in a chapter on plant photography.