I am a teacher and education coordinator at the Biosystematics Group, Wageningen University, NL, since 2013. Before that I was project leader of the PROTA (Plant Resources of Tropical Africa) group at Wageningen University (2010-2013) and chief editor in the PROTA programme (2000-2010). I was assistant professor at the department of Plant Taxonomy of Wageningen University in 1997-1999, and in the same period project leader of the Ecosyn project, dealing with plant diversity in West Africa. In 1989-1997 I was involved in the PROSEA (Plant Resources of South-East Asia) programme as editor, coordinating the activities on dye- and tannin-producing plants, timbers and medicinal plants of South-East Asia. I finished my PhD in plant taxonomy at Wageningen University in 1989.
My main experience is in economic botany, especially the use of plants by ethnic groups in the tropics. I am particularly interested in the rationale of plant use and in threats caused by the usage. I am greatly inspired by teaching botany in ethnobotanical and evolutionary contexts, especially in developing skills of identifying and recognizing species of wild flora, varying from bryophytes to different groups of vascular plants, and from the European flora to tropical plants.