1. Department of Biodiversity and Systematic Biology, National Museum of Wales, Cathays Park, Cardiff CF10 3NP, UK
2. Hindenburgstr. 26A, D-40667 Meerbusch, Germany
3. National Botanic Garden of Belgium, Department of Bryophyta & Thallophyta, Domain van Bouchout, B-1860 Meise, Belgium
4. National Museum of Nature and Science, Department of Botany, 4-1-1, Amakubo, Tsukuba, Ibaraki 305-0005, Japan
5. 39C Holway Road, Taunton TA1 2EZ, UK
6. Kathmandu University, Department of Environmental Science and Engineering, Aquatic Ecology Centre, Dhulikhel PO Box 6250, Kathmandu, Nepal
7. Department of Botany, The Natural History Museum, Cromwell Road, London SW7 5BD, UK