LAB ECOLOGY (J. Van Assche) Mycorrhiza from trees (Pinus, Betula). Influence of heavy metals in the environment. Regulation of germination and dormacy in weeds. Algological studies of water pollution and eutrophication. Biological evaluation and assessment for nature conservation. Restoration of semi-natural ecosystems. LAB SYSTEMATICS (E. Smets) 1. Character research on the Magnoliophytina (flowering plants). 2. Cladistics - theory and practice. 3. Cladistics of Gentianaceae. 4. Floral ontogeny of Primulales, Ebenales and Ericales 5. Floral ontogeny within Cornidae. 6. Phylogeny of the Cornidae with special emphasis on Gentianales and Rubiaceae. 7. Macromolecular systematics of Dipsacales and Ericales 8. Wood anatomy and palynology of Rubiaceae. 9. Wood anatomy of Ericales. 10. Palynology of Dioscoreales. 11. Studies on floral nectar and floral nectaries of species of Mediteranean ecosystems. 12. Characterization of floral nectaries. 13. Systematics of Polygonaceae. 14. Monographic studies in Rubiaceae. 15. Defining androecial and gynoecial characters and character states. 16. Archaeopalynology and vegetation reconstruction 17. Orbicules in Gentianales.