Melica macra is a species of grass that can be found in Argentina, Brazil, and Uruguay.

 The species is bisexual with closed leaf-sheaths and have short rhizomes with culms that are tall. It panicle is long and is linear. Its rachis and branches are scabrous while the ligule is long and is membranous. The glumes are lanceolate, papery and membranous on borders, with difference in size; Lower glume is long by wide while the upper one is long by wide.

Distribution: In Argentina, it is found in such provinces as Buenos Aires, Catamarca, Corrientes, Entre Rios, Formosa, La Pampa, Misiones, Santiago del Estero, Tucumán, San Luis, and Santa Fe.