Japan Flora: Culms rather stiff, 60-80 cm. long, acutely angled, usually retrorsely scabrous on the angles; leaves rather firm, scabrous, 5-8 mm. wide, gradually acuminate, the sheaths broadly 3- winged; partial inflorescences usually 2, sometimes only 1, the terminal larger, 4-5 cm. long, with obliquely spreading branches; spikelets 3-4 nun. long; achen效 globular, white, lustrous, sparsely puberulent, about 2.5 mm. across; hypo­gynium 3-lobed, the lobes ovate-deltoid, acute, flat.  July-Oct. Wet slopes.

Honshu (Kii Prov.), Shikoku, Kyushu. Bonins, Ryukyus, Formosa, China, India, Malaysia, and Aus­tralia.