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JosĂ© Floriano BarĂȘa Pastore and Guilherme Medeiros Antar 2021. Two new endangered species of Polygala series Trichospermae (Polygalaceae), endemic to the Cerrado domain, Tocantins State, Brazil. European Journal of Taxonomy. 762, 1 (Aug. 2021), 133-148. DOI:https://doi.org/10.5852/ejt.2021.762.1459.