Briza media is a perennial grass in the family Poaceae

Poaceae

The Poaceae is a large and nearly ubiquitous family of flowering plants. Members of this family are commonly called grasses, although the term "grass" is also applied to plants that are not in the Poaceae lineage, including the rushes and sedges...

 and is a species of the genus

Genus

In biology, a genus is a low-level taxonomic rank used in the biological classification of living and fossil organisms, which is an example of definition by genus and differentia...

 Briza

Briza

Briza is a genus of annual grasses in the family Poaceae, native to north temperate regions. The group is generally referred to as the quaking grasses because the flower and seedheads shake on their stalks in the slightest breeze...

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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