Fimbristylis spathacea Roth, Nov. Pl. Sp. 24. 1821; F. formosensis C. B. Clarke; F. kankaoensis Hayata; F. wightiana Nees.
Culms obtusely 3-angled, not thick at base. Leaves rigid, 1-3 mm wide. Anthelae open with several elongated rays. Spikelet solitary or 2 or 3 clustered. Stigmas 2(or 3). Nutlet obovoid to broadly obovoid, biconvex or rarely 3-sided. Fl. and fr. Jul-Oct. 2n = 32.
Gravelly places along rivers, sandy seashores; near sea level to 400 m. Fujian, Guangdong, Guangxi, Hainan, Nansha Qundao, Taiwan, Zhejiang [India, Japan, Laos, Malaysia, Sri Lanka, Thailand, Vietnam; Africa].