Glyceria acutiflora Torr.

Culms to 1 m, usually decumbent and often rooting from the lower nodes; lvs 3-6 mm wide; ligule 5-7+ mm; infl erect or declined, narrow, 2-3 dm, the branches erect, strongly flattened or trough-shaped; spikelets 2-4 cm, 5-12-fld; glumes narrowly ovate, the first 2-3.3 mm, the second 3.9-5.6 mm; lemmas lanceolate, 7-8.5 mm, acute, scabrous; palea acuminate, 2-toothed, projecting 1.5-3 mm; rachilla-joints 3-4 mm; stamens 3; 2n=20, 40. Shallow water or very wet soil; Me. to Del., Va., and Tenn., w. to Mich. and Mo.; also in e. Asia.

Ponds and paddy fields in C. and S. Japan. Rice fields, streams and ditches, forming colonies, at elevations of 400-1000 metres in China.

Plants can be grown by seed or division.