1. Department of Botany, The Field Museum, 1400 South Lake Shore Drive, Chicago, Illinois 60605‐2496 USA
2. Department of Environmental Science and Policy, George Mason University, Fairfax, Virginia 22030‐4444 USA
3. Laboratorio de Hongos, Instituto Nacional de Biodiversidad (INBio), Apdo. 22‐3100, Santo Domingo de Heredia, Costa Rica
4. Botanisches Museum Berlin Dahlem, Königin‐Luise‐Strasse 6‐8, D‐14191 Berlin, Germany
5. Botany Department, Charles Darwin Foundation (AISBL), Puerto Ayora, Santa Cruz, Galápagos, Ecuador