异颖草属（学名：Anisachne）是禾本科下的一个属，为多年生草本植物。该属仅有异颖草（Anisachne gracilis）一种，分布于中国西南部。

Calamagrostis (small reed or reed grass) is a genus in the grass family Poaceae, with about 260 species that occur mainly in temperate regions of the globe. Towards equatorial latitudes, species of Calamagrostis generally occur at higher elevations. These tufted perennials usually have hairless narrow leaves. The ligules are usually blunt. The inflorescence forms a panicle. Some may be reed-like.