Third volume in the PROSEA trilogy on the medicinal and poisonous plants of South-East Asia. Brings the total number of papers in the 3 volumes to 548, and of species treated to 1290. The present volume includes many lesser-known species, for which in general little information on the phytochemistry and pharmacology is available compared to those treated in the first (1999) and second (2001) ones. Although presently of little importance, these plant resources may have potential for use in herbal drugs or for the isolation of bioactive compounds. The up-to-date information contained in this volume is, wherever applicable, supplemented by notes on possibilities for research and expectations for the future. Some genera/species that have recently attracted attention because of interesting pharmacological properties are included, e.g. Butea, Calophyllum, Galbulimima belgraveana, Gynura and Morinda. The alphabetical treatment of genera and species in this volume comprises 285 papers, half of which are supplied with an illustration. The approximately 540 species show a large variation in habit, from small herbs to large trees, and in ecology, from rain forest to habitats strongly influenced by man. A short introduction deals particularly with conservation aspects of medicinal plants, being supplementary to the general introduction in the first volume on medicinal and poisonous plants. A glossary, a list of medicinal and poisonous plants with other primary use, and several indices are included.