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Photos of some plants selected for this study, in the rural community of Carão, Altinho, northeastern Brazil. (a) Myracrodruon urundeuva Allemão “aroeira”; (b) Erythrina velutina Willd. “mulungu”; (c) Croton blanchetianus Baill. “marmeleiro”; (d) Schinopsis brasiliensis Engl. “baraúna”. Photos: F. J. Vieira.
