Japan Flora: Rather coarse perennial; culms 60-100 cm. long, acutely angled, retrorsely scabrous; leaves stiff, 5-12 mm. wide, gradually acuminate, scabr이is, the sheath winged, or in de­pauperate specimens wingless; partial inflorescences 3-5, 4-8 cm. long, the branches spreading, hispid-scabrous; spikelets numerous, 3-5 mm. long; achenes globular, about 2.5 mm. across, white to gray, lustrous, loosely and minutely puberu- lent; hypogynium appressed, orbicular, scarcely lobed, rather thickened on margin.  July-Oct.

Kyushu (Yakushima). Ryukyus, Formosa, China, India, Malaysia, and Australia.