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By: Islebe, Gerald A. - Leñero, Lucia Almeida. - Cleef, Antoine M - Weijden, Ronald Ter - De Vries-Lab, HugoType: ArticleIn: Acta Botánica MexicanaVolume: 65Series:Issue:Date: 2003Page Range: 61--82Publication Info: México, Instituto de Ecología, A C, 1988-Subjects: