1. Department of Cryptogamic Botany; Swedish Museum of Natural History; 104 05 Stockholm P.O. Box 50007 Sweden
2. Jodrell Laboratory; Royal Botanic Gardens; Kew, Richmond, Surrey TW9 3AB U.K
3. Department of Botany; The Field Museum; 1400 S. Lake Drive, Chicago, Illinois 60605 U.S.A