Japan Flora: Slender stolons; culms 30-80 cm. long, smooth; leaf-blades 20-30 cm. long, 3-6 mm. wide; panicles 7-20 cm. long; spikelets 5-8 mm. long, pale or glaucous-green, sometimes pardy purplish; glumes unequal, the lower 1- to 3-nerved, 2.5-4 mm. long, the upper 4-4.5 mm. long, 3-nerved, die lateral nerves the length of the glume; lemmas 4-4.5 mm. long. July-Aug. Grassy places in lowlands, especially near seashores; Hokkaido. Sakhalin.

var. yatsugatakensis (Honda) Ohwi Lemmas rather broad, acute, Along rivers in high mountains; Honshu (Mount Yatsugatake in Shinano); rare