HABIT Perennial. Culms 15-70 cm long. Ligule an eciliate membrane. INFLORESCENCE Inflorescence composed of racemes; terminal and axillary. Racemes single; unilateral. Rhachis fragile at the nodes; subcylindrical and excavated. Spikelet packing abaxial. Rhachis internodes cuneate. Rhachis internode tip transverse; crateriform. Spikelets in pairs. Fertile spikelets sessile; 1 in the cluster. Companion sterile spikelets pedicelled; 1 in the cluster. Pedicels fused to internode. STERILE SPIKELETS Companion sterile spikelets well-developed; fused to and deciduous with fertile spikelet belonging to segment above. Companion sterile spikelet glumes muticous. FERTILE SPIKELETS Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets oblong; dorsally compressed; 2.5-3 mm long; falling entire; deciduous with accessory branch structures. Spikelet callus base truncate; with central peg; attached transversely. GLUMES Glumes exceeding apex of florets; firmer than fertile lemma. Lower glume oblong; indurate; 2-keeled; winged on keel. Lower glume surface transversely waisted. Lower glume apex emarginate. Upper glume oblong; membranous; 1-keeled; 3 -veined. FLORETS Basal sterile florets barren; without significant palea. Lemma of lower sterile floret hyaline. Fertile lemma elliptic; hyaline; without keel. DISTRIBUTION Tropical Asia.