1. Clark University, Biology Department, 950 Main Street, Worcester, Massachusetts 01610
2. Department of Plant and Microbial Biology, University of California at Berkeley, Berkeley, California 94720-3102
3. Department of Environment and Conservation, Western Australian Herbarium, Locked Bag 104, Bentley Delivery Centre, Perth, Western Australia 6983, Australia
4. P.O. Box 8546, Victoria, British Columbia, V8W 3S2, Canada
5. Laboratoire de Botanique, Faculté de Sciences Pharmaceutiques et Biologiques, 3 rue du Professeur Laguesse, BP 83, F-59006 Lille Cédex, France
6. Institute of Systematic Botany, New York Botanical Garden, Kazimiroff Boulevard at 200th Street, Bronx, New York 10458-5126
7. University of Washington, Biology Department, Box 355325, Seattle, Washington 98195 USA