HABIT Perennial. Culms 10-40 cm long. Ligule a fringe of hairs. Leaf-blades filiform. INFLORESCENCE Inflorescence composed of racemes. Racemes borne along a central axis; unilateral. Central inflorescence axis tip filiform. Rhachis terminating in a barren extension; extension subulate. Spikelet packing abaxial; 1 -rowed. Spikelets solitary. Fertile spikelets pedicelled. Pedicels linear; tip oblique. FERTILE SPIKELETS Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets obovate; dorsally compressed; 2.5-3.5 mm long; falling entire. Spikelet callus linear; pubescent; base pungent; attached obliquely. GLUMES Glumes one the lower absent or obscure; shorter than spikelet; thinner than fertile lemma. Upper glume oblong; 0.9 length of adjacent fertile lemma; membranous; without keels; 5 -veined. Upper glume surface pubescent; with a transverse fringe of hair. Upper glume apex obtuse. FLORETS Basal sterile florets barren; without significant palea. Lemma of lower sterile floret obovate; membranous; 5 -veined; obtuse. Fertile lemma obovate; indurate; without keel. Lemma apex rostrate. Palea indurate. DISTRIBUTION South America.