HABIT Perennial. Culms 7-19 cm long. Leaf-sheath auricles erect. Ligule an eciliate membrane. Leaf-blade base with a false petiole. Leaf-blades elliptic, or ovate. Leaf-blade venation with distinct cross veins. INFLORESCENCE Monoecious; with male and female spikelets in the same inflorescence. Inflorescence a panicle. Panicle open. Sexes segregated; on bisexual branches; with male above. Spikelets solitary. Fertile spikelets pedicelled. Male spikelets pedicelled. FERTILE SPIKELETS Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets linear; laterally compressed; 2.5-3 mm long; falling entire. GLUMES Glumes both absent or obscure. FLORETS Fertile florets female. Fertile lemma lanceolate; herbaceous; keeled; 5-7 -veined. Lemma surface puberulous. Lemma apex acute. Palea 0.9 length of lemma. Palea surface pubescent. FLOWER Lodicules 2; fleshy; truncate. Anthers 2-3. Stigmas 2. FRUIT Caryopsis with adherent pericarp; ellipsoid; laterally compressed. Embryo 0.33 length of caryopsis. MALE Male spikelets distinct from female; lanceolate. Male spikelet glumes absent, or 1. Male spikelet lemma muticous. DISTRIBUTION South America.