1. Institute of Organic Chemistry, University of Würzburg, Am Hubland, D-97074 Würzburg, Germany, Faculté des Sciences, Université de Kinshasa, B.P. 202, Kinshasa XI, Democratic Republic of the Congo, Swiss Tropical and Public Health Institute, Socinstrasse 57, CH-4002 Basel, Switzerland, University of Basel, Petersplatz 1, CH-4003 Basel, Switzerland, and Department of Biology I, Biodiversity Research, Section Systematic Botany, Ludwig-Maximilians University Munich, Menzinger Strasse 67, D-80638 München,...