假蛇尾草(原变种) jia she wei cao (yuan bian zhong)

Rottboellia laevis Retzius, Observ. Bot. 3: 11. 1783; Heteropholis cochinchinensis (Loureiro) Clayton; Mnesithea laevis var. cochinchinensis (Loureiro) de Koning & Sosef; Ophi-uros cochinchinensis (Loureiro) Merrill; O. laevis (Retzius) Bentham; O. monostachyus J. Presl & C. Presl; Phleum cochin-chinense Loureiro; Thaumastochloa cochinchinensis (Loureiro) C. E. Hubbard.

Culms 20–70 cm tall. Sessile spikelet 3–4 mm; lower glume ± smooth. Fl. and fr. autumn.

Grassy hill slopes, field margins; 100–1000 m. Fujian, Guangdong, Guangxi, Hainan, Taiwan [India, Indonesia, Pakistan, Philippines, Sri Lanka, Thailand, Vietnam; Pacific Islands (Polynesia)].