异名：Oplismenus imbecillis (R. Br.) Roem. et Schult. (synonym)、Oplismenus imbecillis (R. Br.) Roem. et Schult. var. morrisonensis Honda (synonym)、Orthopogon imbecillis R. Br. (synonym)、Panicum imbecille (R. Br.) Trin. (synonym)

var. imbecillis (R. Br.) Hack. in Gov. Lab. Publ. Man. Philip. 25: 82. 1905; Merr. in Philip. Journ. Sci. l. Suppl. 364. 1906: Ohwi in Acta Phytotax. et Geobot. 11: 35. 1942; 台湾植物志5: 566. 1978——Orshopogon imbecillis R. Br. Prodr. 194. 1810. ——Panicum imbecillie (R. Br. ) Trin. Sp. Gram. Icon. 2: t. 191. 1829. ——Oplismenus imbecillis var. morrisonensis Honda in Bot. Mag. Tokyo 38: 190. 1924, et in Journ. Fac. Sci. Univ. Tokyo Sect. III. Bot. 3: 272. 1930.

秆纤细；叶鞘光滑无毛或边缘有纤毛；叶片狭披针形或线状披针形，无毛或被微毛，长4-8厘米，宽5-12毫米；花序轴及穗轴无毛，小穗疏生毛。

产陕西、安徽、江苏、浙江、江西、湖南、湖北、贵州、台湾、云南；生于山坡、草地阴湿处。日本也有分布。