This third volume in the Genera Orchidacearum series describes the remaining 105 genera of subfamily Orchidoideae and all 15 genera of subfamily Vanilloideae. Comprehensive treatments are provided for each genus, which include complete nomenclature, description, distribution (with map), anatomy, palynology, cytogenetics, phytochemistry, phylogenetics, pollination, ecology, and economic uses. Cultivation notes are included for those genera known to be in hobbyist collections. Genera are beautifully illustrated with 242 line drawings and 24 pages of color photographs.