Nassella charruana

Shortly rhizomatous, tufted perennial, culms exceeding leaves, to 1 m high. Leaves scabrous, usually involute (soemtiems loosely) in vivo, to c. 60 cm long, 1.5–2 mm when flattened; ligule membranous, 0.5–1 mm long. Inflorescence a loosely contracted panicle, sometimes partly retained at the base in the upper leaf sheath. Glumes acuminate, subequal, 14–18 mm long, purplish when young; lemma cylindric 5.5–7.5 mm long, scabrous-tuberculate; corona 3.5-5 mm long, membranous, minutely fringed apically; callus c. 2 mm long with white hairs to 0.5 mm long; awn once-or twice bent, 45–90 mm long, twisting in the lower one-third, scabrous; palea hyaline, c. 1.5 mm long. Flowers Oct.–Feb.