Description: In the present revision of Mezzettia Beccari four species are recognized, including one new, M. macrocarpa Heijden & Ke\xc3\x9fler.

Description: During the last three years the Rijksherbarium/Hortus Botanicus (L) has been involved in the Tropenbos Kalimantan Programme, a co-operative programme between AFRD (Agency of Forest Research and Development, Indonesian Ministry of Forestry) and the \xe2\x80\x98Tropenbos\xe2\x80\x99 Foundation. The implementation of this programme is executed by AFRD and its institutes on the Indonesian side and the IBG-DLO (Instituut voor Bosbouw en Groenbeheer \xe2\x80\x93 Dienst Landbouwkundig Onderzoek), Wageningen, and L on the Dutch side. UNESCO-MAB has funded research in soil science. The programme is supported by the forestry state enterprises Inhutani I and II, and other concessionaires. A close co-operation exists with the Faculty of Forestry of the Mulawarman University, Samarinda.\nThe research of the \xe2\x80\x98Botanical Research Group\xe2\x80\x99 focused on the following main points: 1. Preparation of a manual of forest trees in the Wanariset research forest and surroundings; 2. A study of non-wood forest products and their socio-economic relevance; 3. Establishment and management of a computerized database; 4. Comparative wood quality studies of plantation-grown Shorea; 5. Botanical training and training in forest tree recognition; 6. Establishment and management of the \xe2\x80\x98Wanariset Herbarium\xe2\x80\x99.

Description: As almost half of the Malesian species of Meliaceae are found in the genus Aglaia, we are glad to receive a sound monograph published for this ecologically so important genus. The format can be characterized as \xe2\x80\x98classical\xe2\x80\x99, with chapters on taxonomic history, morphology, floral biology and pollination, fruit and seed-dispersal, germination, cytology, variation and distribution, besides the pure taxonomic revision. The first part would have been a little more attractive for the reader if certain characters had been drawn, especially some of the very intricate or minute features as scales and stellate hairs which have been used intensively in the key and for which, unfortunately, every botanist seems to have his own definition.\nThe 105 species are described in great detail, including lengthy citations of representative specimens. An identification list at the end of the volume seems much more helpful for the users, especially curators of herbaria, and would have reduced the number of pages drastically without loss of important information. But what is really a little bit annoying is the key to the species. First of all the key is very difficult to read and especially to find the corresponding leads due to the chosen lay-out. Of course, it is obvious that it is an immense work to construct a key to 105 species that is userfriendly, but there are solutions which serve the reader much better, i.e., to give separate keys to the species of at least some of the phytogeographical entities. The bigger islands or island groups and the Asian mainland certainly deserve their own keys to facilitate the identification process.

Description: After a discussion about Orophea multiflora, / O. chinensis. three new species (O. sarawakensis, O. leuseri, O. malayana) are described. Amended keys to subgenera and species are presented too, including new facts about some species recognized in the recent revision of the genus Orophea.