1. Tyumen State Univ. Tyumen Russia
2. Joint Directorate of the Mordovia State Nature Reserve and National Park ‘Smolny' Saransk Russia
3. Ojców National Park Poland
4. Dept of Systematics and Floristics of Vascular Plants, Kholodny Inst. of Botany of the National Academy of Sciences of Ukraine Kyiv Ukraine
5. Inst. of Biology, Ufa Research Centre RAS Ufa Russia
6. Dept of Botany and Mycology, Voronezh State Univ. Voronezh Russia
7. Inst. of Ecology the Volga River Basin of RAS Togliatti Russia
8. Botanical Garden, Komarov Botanical Inst. of Russian Academy of Sciences St Petersburg Russia
9. Herbarium, Komarov Botanical Inst. of Russian Academy of Sciences St Petersburg Russia
10. Inst. of Biology, Komi Research Center, Ural Branch, RAS Syktyvkar Russia
11. Laboratory of Flora and Plant Systematics, Inst. of Experimental Botany of the National Academy of Sciences of Belarus Minsk Belarus
12. Laboratory of Flora and Geobotany, Inst. of Botany, Nature Research Centre Vilnius Lithuania
13. Dept of Botany, Inst. of Agricultural and Environmental Sciences, Estonian Univ. of Life Sciences Tartu Estonia
14. Laboratory for Landscape Ecology and Forest Ecosystems Protection, Forest Research Inst. of Karelian Research Centre, Russian Academy of Sciences Petrozavodsk Russia
15. Academy of Agrotechnology, Crimean Federal Univ. Simferopol Russia
16. Dept of Ecology and Plant Geography, Biological Faculty, Lomonosov Moscow State Univ. Moscow Russia
17. Avrorin Polar‐Alpine Botanical Garden‐Inst. of Kola Research Centre of Russian Academy of Sciences Apatity Murmansk Region Russia
18. Botanical Museum, Finnish Museum of Natural History, Univ. of Helsinki Finland