1. Swedish Museum of Natural History, Department of Cryptogamic Botany, Box 50007, SE-104 05 Stockholm, Sweden
2. Dept. Biología (Botánica), Fac. Ciencias, Universidad Autónoma de Madrid, c/ Darwin, 2, E-28049, Madrid, Spain
3. A.N.Belozersky' Research Institute of Physico-Chemical Biology, Moscow State University, Moscow 119991 Russia
4. Main Botanical Garden of Russian Academy of Sciences, Botanicheskaya 4, Moscow 127276 Russia