The Forest Botany Division (Forest Herbarium-BKF is used here in English page) undertakes research on plant and fungal taxonomy, forest ecology, ethnobotany and conservation biology. The aims and duties of the Forest Herbarium include the following activities:

1. Conduct botanical inventories, collect plant specimens and undertake plant taxonomic research for the "Flora of Thailand Project", in collaboration with Japanese, Danish, Dutch and Brittish botanical institutes. An important aspect of this task is maintenance of the Forest Herbarium.

2. Survey and classification of forest types in Thailand. Based on ground surveys, Thai forests are described with respect to their structure and species composition. The purpose of this is to identify silvicultural priorities, economic plants and to strengthen conservation management.

3. Establish contacts and make the collections available for groups dealing with conservation and protected area management, silviculturists and ecologists, wildlife experts and lay people, and facilitate their research activities within Thailand.

4. Supervise management and research of botanical gardens and arboreta located throughout Thailand.