A. Structural Botany.- I. General and Molecular Cytology: The Cytoskeleton: Microfilaments.- II. Cytology and Morphogenesis of Fungal Cells.- III. Vergleichende Morphologie des Vegetationsk?rpers.- IV. Reproductive Structures of the Flowering Plants.- B. Physiology.- I. Mineral Nutrition: Anions.- II. Photosynthesis: Antennae and Reaction Centers.- III. Metabolism of Inorganic Nitrogen Compounds.- IV. Secondary Plant Substances. Aspects of Steroid Biosynthesis.- V. Growth.- VI. Movement of Pulvinated Leaves.- C. Genetics.- I. Replication.- II. Recombination: Asexual Recombination in Higher Plants.- III. Mutation: Higher Plants.- IV. Function of Genetic Material. Ribulose-Bisphosphate-Carboxylase as a Tool for the Study of Gene Function in Plants.- V. Extranuclear Inheritance: Plastid Genetics.- VI. Population Genetics.- D. Taxonomy.- I. Systematics of the Bryophytes.- II. Evolution and Classification of Seed Plants.- E. Geobotany.- I. Areal- und Florenkunde (Floristische Geobotanik).- II. The History of Flora and Vegetation During the Quaternary.- III. Vegetation Science (Sociobiological Geobotany).- IV. Ecosystem Research (Ecological Geobotany).- F. Special Topics.- I. Seed Dispersal.- Plant Name Index.