1. Department of Botany, Institute of Ecology and Earth Sciences, University of Tartu, Lai 40, EE-51015 Tartu, Estonia
2. Botanical Unit (Mycology), Finnish Museum of Natural History, University of Helsinki, P.O. Box 7, FI-00014, Helsinki, Finland
3. Biology Centre of the Academy of Sciences of the Czech Republic, Branišovská 31, 370 05 České Budějovice, Czech Republic
4. Beijing Advanced Innovation Center for Tree Breeding by Molecular Design, Beijing Forestry University, Beijing 100083, China
5. Natural History Museum, University of Oslo, P.O. Box 1172, NO-0318 Oslo, Norway