Tatianyx is a genus of plants in the grass family.Zuloaga, F. O. & T. R. Soderstrom. 1985. Classification of the outlying species of New World Panicum (Poaceae: Paniceae). Smithsonian Contributions to Botany 59: i–iii, 1–63Grassbase - The World Online Grass Flora The only known species is Tatianyx arnacites, native to the States of Bahia, Goiás, Mato Grosso, Minas Gerais, and Pará.Forzza, R. C. 2010. Lista de espécies Flora do Brasil http://floradobrasil.jbrj.gov.br/2010. Jardim Botânico do Rio de Janeiro, Rio de JaneiroThe Plant List, Tatianyx arnacites (Trin.) Zuloaga & Soderstr.
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