Affiliation: | Department of Botany, Stockholm University, S-106 91 Stockholm, Sweden, Institute of Botany, Academy of Sciences of the Czech Republic, CZ-252 43 Prùhonice, Czech Republic,;Department of Botany, Faculty of Science, Charles University, Benátská2, CZ-12801 Praha 2, Czech Republic, and;Department of Ecology and Evolutionary Biology, FB 2, University of Bremen, Leobener Str., D-28359 Bremen, Germany |