Japan Flora: Soft green annual; culms 3-15 cm. long; leaves 1-2 mm. wide; inflorescence capitate, globose, 1-1.5 cm. in di­ameter, densely many-spiculose, the bracts leaflike, longer than the inflorescence; spikelets mostly flat, lanceolate to broadly so, 2-   6 mm. long, 1-1.3 mm. wide, acute, pale green; scales broadly lanceolate, 1.5-2 mm. long, 2-ranked, hyaline, faintly 3- to 5-nerved, very obtuse and mucronate, the mucro ex­tremely short, erect, sparsely spinulose or smooth; achenes 1/2-2/3 as long as the scale, narrowly oblong, planconvex, light brown, acutely angled; stigmas 2.  Aug.-Oct.

Hon­shu, Shikoku.