1. Department of Botany, Faculty of Science, Charles University, Benátská, Praha, Czech Republic
2. Institute of Botany, The Czech Academy of Sciences, Zámek, Průhonice, Czech Republic
3. Department of Botany, Faculty of Science, University of South Bohemia, Branišovská, České Budějovice, Czech Republic
4. University Herbarium and Department of Integrative Biology, University of California, Berkeley, CA, USA