1. Universidade Federal de Uberlândia, Programa de Pós‐graduação em Biologia Vegetal Rua Ceará s/n Uberlândia Minas Gerais 38400‐902 Brazil
2. The University of AlabamaDepartment of Biological Science 411 Mary Harmon Bryant Hall Tuscaloosa Alabama 35487 U.S.A.
3. Royal Botanic Gardens Kew, Richmond, Surrey TW9 3AB U.K.
4. Facultad de Ciencias Agrarias (UNNE)Instituto de Botánica del Nordeste Sargento Cabral 2131 Corrientes 3400 Argentina
5. Donald Danforth Plant Science Center, 975 North Warson Road St. Louis Missouri 63132 U.S.A.