Japan Flora: Somewhat resembling No. 1, but rhizomes slender, elongate, without a terminal tuber, the spikelets more numerous and dense; culms stout, 30-80 cm. long, scabrous above; leaves 5- 10 mm. wide; spikelets linear, 7-20 mm. long, 2-3 mm. wide, often somewhat reddish brown, scales broadly ovate, about 2 mm. long, acute, 2-nerved on both sides; achenes 3/5 as long as the scale, broadly ellipsoidal, 3-angled, brownish, the faces slightly concave; stigmas 3. July-Oct. Wet places.

Hon­shu (centr. distr. and westw.), Shikoku, Kyushu. Ryukyus, Formosa, China, Malaysia, Indh, N. Australia, and tropical West Africa.