1. Institute of Dendrology, Polish Academy of Sciences , Parkowa 5, 62-035 Kórnik , Poland
2. School of Life Sciences, Keele University , Keele, Staffordshire ST5 5BG , UK
3. National Botanical Garden of Georgia , Botanikuri Street 1, Tbilisi , Georgia
4. Faculty of Agricultural Science and Bio-System Engineering, Georgian Technical University , Guramishvili Str. 17, Tbilisi , Georgia
5. Forest Development Service, Ministry of Ecology and Natural Resources , B. Agayev Str, 100 A, Baku, AZ1000 , Azerbaijan
6. The Role of Culture in Early Expansions of Humans (ROCEEH) Research Centre, Heidelberg Academy of Sciences, Senckenberg Research Institute , Senckenberganlage 2560325 Frankfurt/M , Germany
7. Department of Silviculture, Poznań University of Life Sciences , Wojska Polskiego 71c, 61-625, Poznań , Poland