Japan Flora: Ciner­eous-green; rhizomes short-creeping, branching; culms erect, 25-50 cm. long, slender, longitudinally striate, the basal sheaths few, scalelike; inflorescence pseudolateral, cymose, many-flowered, the lowest bract having the appearance of a continuation of the culm, sometimes up to 20 cm. long; flow­ers solitary, 3 mm. long inclusive of the capsule, light green; perianth-segments acute, equal in length; stamens 3, slightly shorter than the perianth; capsule exceeding the perianth, al­most spherical, very obtuse; seeds broadly ovoid, about 0.6 mm. long.  Aug.-Oct. Wet places.

Honshu, Shikoku, Kyu­shu. China and Korea.