Otachyrium is a genus of South American plants in the grass family. Species 1. \n* Otachyrium aquaticum Send. & Soderstr. - Bahia, Minas Gerais 2. \n* Otachyrium boliviense Renvoize - Bolivia 3. \n* Otachyrium grandiflorum Send. & Soderstr. - Venezuela (Amazonas), Brazil (Goiás, Amazonas, D.F., Roraima) 4. \n* Otachyrium inaequale Pilg. - Guyana, Suriname, French Guiana, Venezuela, Brazil 5. \n* Otachyrium piligerum Send. & Soderstr. - Goiás 6. \n* Otachyrium pterigodium (Trin.) Pilg. - Minas Gerais, Amazonas, D.F. 7. \n* Otachyrium seminudum Send. & Soderstr. - Goiás, Mato Grosso, D.F. 8. \n* Otachyrium versicolor (Döll) Henrard - Guyana, Suriname, French Guiana, Venezuela, Brazil, Colombia, Bolivia, Paraguay, Argentina (Corrientes, Misiones)