This phylogenetic revision presents detailed descriptions, images and drawings of the Clusiaceae and Hypericaceae of Thailand. In total 32 species are included. A list of alternative scientific names and IUCN status are given for each. A dichotomous key and mullti-access key are provided for identification. The 325 photographs and line drawings aid recognition and highlight important characteristics of each species. The glossary gives explanations with accompanying drawings of botanical terms used. This interactive CD-ROM is a useful addition to anybody interested in South-East Asian plants and the Clusiaceae and Hypericaceae in particular.