1. Botanical Museum, Lund University, Östra Vallgatan 18, SE-223 61 Lund, Sweden
2. Department of Biology, University of Bergen, Allégaten 41, N-5007 Bergen, Norway
3. Institute of Plant Science, Karl-Franzens University, Holteigasse 6, A-8010 Graz, Austria
4. School of Life Sciences, Södertörn University College, SE-181 49 Huddinge, Sweden
5. Cryptogamic Botany, Swedish Museum of Natural History, P.O. Box 50007, SE-10405 Stockholm, Sweden