Slovenská botanická spoločnosť
Katedra botaniky PrF Univerzity Komenského, Bratislava
PrF Univerzity P. J. Šafárika, Košice
Finnish Museum of Natural History
Hungarian Natural History Museum - Department of Botany, Budapest
Institute of Ecology and Botany, Vácrátót
Bundesamt für Naturschutz - The German Federal Agency of Nature Conservation
Botanic Garden and Botanical Museum Berlin-Dahlem
Institut für Spezielle Botanik, Friedrich-Schiller-Universität, Jena
Institute of Plant Genetics and Crop Plant Research, Gatersleben
Thüringische Botanische Gesellschaft
Nationaal Herbarium Nederland (NHN)
Nederlandse Varenvereniging - The Dutch Fern Society
Polskie Towarzystwo Botaniczne
Institute of Botany, Jagiellonian University, Kraków
Institute of Botany and Botanical Garden, University of Vienna
University of Vienna - herbarium (WU)
Naturhistorisches Museum Wien - Botanische Abteilung
Department of Systematic Botany, Uppsala University
Swedish Museum of Natural History
Historical Botanical Collection - Swedish Museum of Natural History
University of Basel, Institute of Botany
Botanical Society of the British Isles
BES - British Ecological Society
Royal Botanical Gardens, Kew - Herbarium collections
Natural History Museum, Department of Botany
American Society of Plant Taxonomists
Fairchild Tropical Botanical Garden
Botanical Resource Center - Fairchild Tropical Botanical Garden
Australian Systematic Botany Society
Centre for Plant Biodiversity Research and Australian National Herbarium