HABIT Perennial. Rhizomes short. Culms geniculately ascending; 20-48 cm long. Ligule an eciliate membrane. Leaf-blade base with a brief petiole-like connection to sheath. Leaf-blades oblong. INFLORESCENCE Monoecious; with male and female spikelets in the same inflorescence. Inflorescence composed of racemes; embraced at base by subtending leaf. Racemes single. Rhachis angular. Sexes mixed. Spikelets in pairs. Fertile spikelets pedicelled; 1 in the cluster. Male spikelets pedicelled; 1 in a cluster. Pedicels filiform, or cuneate. FERTILE SPIKELETS Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets lanceolate; dorsally compressed; 9.5-11.5 mm long; falling entire. GLUMES Glumes reaching apex of florets; thinner than fertile lemma. Lower glume ovate; 1 length of upper glume; coriaceous; without keels; 5-6 -veined. Lower glume apex acute. Upper glume ovate; 1 length of adjacent fertile lemma; coriaceous; without keels; 5-7 -veined. Upper glume lateral veins with cross-veins. Upper glume apex acute. FLORETS Fertile florets female. Fertile lemma lanceolate; indurate; without keel; 5-8 -veined. Lemma surface pilose. Lemma margins convolute; covering most of palea. Lemma apex acuminate. Palea tightly convolute around flower; 0.9 length of lemma; indurate; 2-4 -veined; without keels. Palea surface pilose. FLOWER Lodicules 3. Anthers 3. Stigmas 2; papillose. MALE Male spikelets distinct from female; lanceolate. Male spikelet glumes absent. Male spikelet lemma muticous. DISTRIBUTION South America.