Japan Flora: 1.   Culms 70-100 cm. long, rather slender; leaf-blades flat, 15-25 cm. long, 3-5 mm. wide, green; spikes nodding, slender, 10-15 cm. long, green, the numerous spikelets loosely arranged, 15-20 mm. long, 5- to 7-flowered, appressed; glumes lanceolate, 3- to 5-nerved, short-acuminate, 6-8 mm. long; lemmas prominently 5-nerved above, rigidly ciliate toward the margin, 7-9 mm. long, entire, the awn straight, slender, 15-25 mm. long; palea as long as the lemma, ciliate on the keels. July. Woods.

Hokkaido, Honshu (mts. in Shinano); rare. e. Siberia, Manchuria, and n. Korea.

var. tashiroi (Ohwi) Ohwi. A. tashiroi Ohwi. Lemmas glabrous.  Honshu (Chiigoku Di str.); rare. Korea (Mount Keumkangsan).