1. Department of Biology, University of Miami, PO Box 249118, Coral Gables, Florida 33124, USA,
2. Centro de Energia Nuclear na Agricultura, University of São Paulo, CP 96, 13416–000, Piracicaba, SP, Brazil,
3. Coordenação de Pesquisas em Botânica, Instituto Nacional de Pesquisa da Amazônia, CP 478, 69083–000, Manaus, AM, Brazil,
4. Woods Hole Research Centre, Woods Hole, Massachusetts, 02543, USA