HABIT Perennial. Culms 5-20 cm long. Ligule absent. 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. Synflorescence on a separate leafless culm. Inflorescence composed of racemes. Racemes paired. Rhachis angular. Sexes segregated; on unisexual branches; with male conjugate. Spikelets solitary. Fertile spikelets pedicelled. Male spikelets pedicelled. Pedicels filiform, or cuneate. FERTILE SPIKELETS Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets elliptic; dorsally compressed; 2-2.5 mm long; breaking up at maturity; disarticulating below each fertile floret. GLUMES Glumes persistent; shorter than spikelet; thinner than fertile lemma. Lower glume ovate; 1 length of upper glume; herbaceous; without keels; 5 -veined. Lower glume apex acute. Upper glume ovate; 0.75 length of adjacent fertile lemma; herbaceous; without keels; 3 -veined. Upper glume apex acuminate. FLORETS Fertile florets female. Fertile lemma ovate; coriaceous; without keel. Lemma margins involute. Lemma apex acute. Palea 1 length of lemma; coriaceous; 2 -veined. MALE Male spikelets distinct from female; lanceolate. Male spikelet glumes absent. Male spikelet lemma muticous. DISTRIBUTION South America.