白茅（学名：Imperata cylindrica），又名藗，为禾本科白茅属下的一个种。

Imperata cylindrica, commonly known as blady grass, cogon grass /koʊˈɡoʊn/, kunai grass /ˈkuːnaɪ/, or Japanese bloodgrass, is a species of grass in the genus Imperata. It is placed in the subfamily Panicoideae, supertribe Andropogonodae, tribe Andropogoneae.