Tibouchina bruniana P. J. F. Guim. and T. araguaiensis P. J. F. Guim., two new species from Goiás and Tocantins, respectively, in central Brazil, are described, illustrated, and compared to their putative closest relatives. Both new species belong to Tibouchina sect. Barbigerae Naudin, which is characterized by long, simple trichomes on the anthers, positioned over the union between the staminal filament and connective. Tibouchina bruniana can be distinguished by its solitary flowers, less often in dichasia, and the diagnostic characters of T. araguaiensis presents as ciliate and overlapping triangular hypanthial scales.
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