1. Institute for Botany and Botanical Garden, Faculty of Biology, University of Belgrade, Belgrade, Serbia
2. Institute for Botany and Botanical Garden, Faculty of Biology, University of Belgrade, Belgrade, Serbia + Department of Botany, Institute of Biology and Ecology, Faculty of Science, Pavol Jozef Šafárik University in Kosice, Košice, Slovakia
3. Botanical Department, Hungarian Natural History Museum, Budapest, Hungary