Japan Flora: Rhizomes short; culms 70-100 cm. long, slender, short-pubescent below the spike and on nodes; leafblades flat, thin, broadly linear to lanceolate, 10-25 cm. long, 1-2 cm. wide, green; spikes exserted, pendulous, 10-15 cm. long, slender, the axis densely pubescent; spikelets sessile, 10- 12 mm. long, 1- or 2-flowered, green; florets readily deciduous; glumes subulate, 4-6 mm. long, sometimes wanting; lemmas about 10 mm. long, sparsely hispid toward the apex, the awn straight, 15-20 mm. long; rachilla slender; palea as long as the lemma, lanceolate. June-July. Mountain woods.
Hokkaido, Honshu, Shikoku, Kyushu; rather rare. Korea.
Japan Flora: Rhizomes slender; culms in loose tufts, slender, 60-80 cm. long, smooth; leafblades deep green, thin, flat, broadly linear, 10-20 cm. long, 8-15 mm. wide; spikes slender, pendulous or prominently nodding, about 10 cm. long, the axis glabrous; spikelets solitary, sessile, 1-flowered, slightly ascending; florets readily deciduous; glumes wholly suppressed or short-subulate, to 4 mm. long; lemmas about 10 mm. long, lanceolate, long-hispid near the margin, the awn erect, slender, 15-25 mm. long; rachilla slender; palea as long as the lemma. June-July. Woods.
Honshu (Shinano and westw.), Shikoku, Kyushu; rare.