1. Department of Botany; Smithsonian Institution; PO Box 37012 Washington DC 20013-7012 USA
2. Department of Systematic Botany, Albrecht-von-Haller Institute of Plant Sciences; University of Goettingen; Untere Karspuele 2 37073 Goettingen Germany
3. National Tropical Botanical Garden; 3530 Papalina Road Kalaheo HI 96741 USA
4. Environmental Genetics and Genomics Laboratory; Northern Arizona University; PO Box 5640 Flagstaff AZ 86011 USA