Japan Flora: Perennial, glabrous except for white hairs at mouth of sheaths; culms erect from an ascending base, rather thick, smooth; leaf-blades soft, linear, almost filiform, 6-15 cm. long, strongly involute, smooth, 2-3 mm. wide when flat, nerves not promi­nent; ligules truncate, 0.5-1 mm. long, hyaline, entire; sheaths slightly folded, smooth; racemes 2 or 3, erect; rachis 1.5-2 mm. wide； spikelets very short-pedicelled, appressed, ovate-oblong, 3.5-45 mm. long, acute, pale yellow, slightly lustrous, gla­brous; second glume thinly membranous, acute, as long as the spikelet, with a pair of weak nerves close to the margins; sterile lemma similar, with a distinct midnerve; fertile lemma slightly shorter than the spikelet, slightly flattened, pale, acute, with few fine hairs at apex.  June-Sept

Kyushu (Yakushima). Ryukyus, Formosa, and in tropical regions gen­erally.