1. Department of Biological, Sciences Louisiana State University, Baton Rouge, Louisiana 70803
2. Department of Biological Sciences, University of South Carolina, Columbia, South Carolina 29208
3. Department of Botany and Plant Pathology, Purdue University, 915 W. State Street, West Lafayette, Indiana 47907
4. Faculty of Science, University of South Bohemia, Branišovská 31, 370 05 České Budějovice, Czech Republic
5. Department of Organismic and Evolutionary Biology and Farlow Reference Library and Herbarium of Cryptogamic Botany, Harvard University, Cambridge, Massachusetts 02138