1. Institute of Botany of the Czech Academy of Sciences Průhonice Czech Republic
2. Department of Botany Faculty of Science Charles University Praha Czech Republic
3. Department of Forest Ecology Faculty of Forestry and Wood Sciences Czech University of Life Sciences Prague Praha Czech Republic
4. Faculty of Environmental Sciences Czech University of Life Sciences Prague Praha Czech Republic
5. Department of Botany Faculty of Science University of South Bohemia České Budějovice Czech Republic