Taxonomic revision of Beilschmiedia in Borneo

A revision of Beilschmiedia Nees (Lauraceae) in Borneo is given. Descriptions, distribution maps, illustrations of leaves, terminal buds, and flowers, and a key to the species are provided. Twenty-six species were recognized, including one newly described species. The new species is distinguished from the other Beilschmiedia species of Borneo in having pubescent anther apices. Beilschmiedia reticulata was excluded from the revision as an imperfectly known species because of a lack of flowering specimens. Beilschmiedia eusideroxylocarpa was also excluded because it had only six stamens representing the second and third whorls, which is characteristic for the genus Endiandra.