The wood of Guattarda uruguensis Cham is described . et Schlecht, with respect to gestures, microscopes and macroscopic characters. The species shows an anatomical structure concordant with the literature references for the botanical genus and family Rubiaceae. Among the characters, the occurrence of numerous and very small extremities, solitary or short radial multiples, simple perforation plate, small and ornate intervessel pits, absent axial parenchyma, septate fibers and heterogeneous rays I, with predominance of bi- series
