1. Department of Botany, University of Wisconsin–Madison, 430 Lincoln Dr., Madison, Wisconsin 53706 USA
2. Department of Plant Biology, College of Agronomy, University of the Republic, Avenida Eugenio Garzón 780, CP 12900 Montevideo, Uruguay
3. Department of Botany, Center of Biological Sciences, Federal University of Pernambuco, Rua Nelson Chaves s/n 50670‐420, Recife, Pernambuco, Brazil