Japan Flora: Culms tufted, many, slender, erect, 10-15 cm. long, smooth, 1- or 2-leaved; radical leaves erect, aggregated, about 0.5 mm. wide, the sheaths somewhat sanguineous, the mouth glabrous; corymbs 2 or 3, small, um- belliform or capitate, bearing 2-10 spikelets, the bracts seta­ ceous or leaflike, sheathing below; spikelets compressed, lance­olate, 4-6 mm. long, acute, stramineous, usually somewhat dark red-tinged, somewhat lustrous, with 5 or 6 scales; achenes about 1 mm. long, obovoid-globular, whitish, turgid, 3-angled, minutely reticulate, the bristles 6, nearly 2 mm. long, antrorsely scabrous, caducous.  

Honshu, Shikoku, Kyushu; rather rare. Ryukyus, Malaysia, and Australia.