1. Department of Chemistry, Biology and Biotechnology University of Perugia Perugia Italy
2. Institute of Biosciences and BioResources National Research Council Palermo Italy
3. IBERIS Società Cooperativa Ribera Italy
4. Botanic Garden and Department of Biology University of Fribourg Fribourg Switzerland
5. Natural History Museum Fribourg Switzerland
6. Eastern China Conservation Centre for Wild Endangered Plant Resources Shanghai Chenshan Botanical Garden Shanghai China
7. Department of Agricultural, Food and Forest Sciences University of Palermo Palermo Italy
8. Botanical Unit, Department STEBICEF University of Palermo Palermo Italy