1. National Centre for Biosystematics; Natural History Museum; University of Oslo; P.O. Box 117 Blindern; NO-0318; Oslo; Norway
2. Microbial Evolution Research Group (MERG); Department of Biology; University of Oslo; P.O. Box 1066 Blindern; N-0316; Oslo; Norway
3. Laboratoire d'Ecologie Alpine CNRS UMR 5553; Univ. Joseph Fourier; BP 53; 38041 Grenoble Cedex 9; France
4. Kits van Waveren Foundation; Nationaal Herbarium Nederland; Universiteit Leiden; P.O. Box 9514; 2300 RA; Leiden; The Netherlands
5. Geography and Environment; University of Southampton; University Road; Southampton; UK
6. Centre for GeoGenetics; Natural History Museum of Denmark; Øster Voldgade 5-7; 1350; Copenhagen K; Denmark