1. Laboratorio de Botánica, Facultad de Agronomía Av. Garzón 780, Montevideo CP 12900 Uruguay
2. Jepson Herbarium and Department of Integrative Biology University of California Berkeley California 94720 U.S.A.
3. Department of Botany (MRC 166) National Museum of Natural History Smithsonian Institution P.O. Box 37012, Washington D.C. 20013‐7012 U.S.A.