Japan Flora: Rhizomes short, slender, branched; culms very slender, 50-70 cm. long, glabrous; leaf­blades green, flat, thin, broadly linear, 7-12 cm. long, 4-7 mm. wide, sparingly pilose above and on margin; ligules 2-3 mm. long, truncate; panicles 10-15 cm. long, green, branches short, erect or appressed to the axis; spikelets several, short-pedicelled, 1-flowered, 8-9 mm. long; glumes linear-lanceolate, 1-nerved, acute, the lower 1-1.5 mm., the upper 2-3 mm. long; lemma narrowly lanceolate, minutely scabrous, gradually narrowed to the awned apex, the awn straight, delicate, 10-15 mm. long; callus minutely pilose on both sides; rachilla prolonged as a slender bristle about 4 mm. long, appressed to the palea.  July-Aug. Woods in mountains.

Honshu (centr. distr. and westw.), Shikoku, Kyushu. Korea (Quelpaert Isl.).