The names of all rhododendron cultivars and Groups known to have been used up to 31 December 2002. It covers all azaleas, azaleodendrons and vireya rhododendrons as well as the `core' of hardy rhododendrons. Includes plant category, parentage, names of those involved in the development of each plant, detailed descriptions, synonyms. Also includes a glossary of terms, and names and addresses of all individuals, nurseries and estates mentioned in the book. Lists 14298 hardy rhododendrons, 12989 azaleas, 108 azaleodendrons and 680 vireyas.