1. Department of Molecular and Computational Biology, University of Southern California, Los Angeles, California 90089;
2. Center for Population Biology, University of California, Davis, California 95616
3. Department of Ecology and Evolutionary Biology, University of Arizona, Tucson, Arizona 85721
4. Department of Biological Sciences, Florida International University, Miami, Florida 33199
5. Center for Tropical Plant Conservation, Fairchild Tropical Botanical Garden, Coral Gables, Florida 33156
6. Department of Biology, University of California, Riverside, California 92521
7. Centro de Ciencias Genómicas, Universidad Nacional Autónoma de Mexico, Cuernavaca, Morelos 62210 Mexico