Affiliation: | 1. Department of Botany, Federal University of Pernambuco, Av. Prof. Moraes Rego, s/n, Cidade Universitária, 50670‐901 Recife, PE, Brazil, (phone: +55‐81‐21267813;2. fax: +55‐81‐21267803);3. Department of Biology, Federal Rural University of Pernambuco, 52171‐900 Recife, PE, Brazil |