凌风草（学名：Briza media）为禾本科凌风草属下的一个种。

Briza media is a perennial grass in the family Poaceae and is a species of the genus Briza.

Common name includes Quaking-grass, Cow-quake, Didder, Dithering-grass, Dodder-grass, Doddering Dillies, Doddle-grass, Earthquakes, Jiggle-joggles, Jockey-grass, Lady's-hair, Maidenhair-grass, Pearl Grass, Quakers, Quakers-and-shakers, Shaking-grass, Tottergrass, Wag-wantons