1. Universidade Federal Rural da Amazônia, Campus Capanema, Avenida Barão de Capanema, s/n 68700‐665 Capanema PA Brazil
2. Departamento de Botânica Instituto de Biociências, Universidade de São Paulo, Rua do Matão, 277 05508‐090 São Paulo SP Brazil
3. Department of Biological Sciences University of Arkansas Fayetteville Arkansas 72701 U.S.A.
4. Grupo de Investigación Biología CES, Facultad de Ciencias y Biotecnología Universidad CES, Calle 10 A, No. 22‐04 Medellín Antioquia Colombia
5. Department of Botany University of British Columbia, 6270 University Boulevard Vancouver British Columbia V6T 1Z4 Canada
6. UBC Botanical Garden and Centre for Plant Research University of British Columbia, 6804 Marine Drive SW Vancouver British Columbia V6T 1Z4 Canada
7. Institute of Systematic Botany, The New York Botanical Garden Bronx New York 10458‐5126 U.S.A.
8. Jardim Botânico do Rio de Janeiro, Pacheco Leão 915 22460‐030 Rio de Janeiro RJ Brazil