Genus Bromus refers to a group of annual and perennial grasses commonly known as brome. In scientific classification, Genus Bromus falls under the family Poaceae, and it has about 160 recognized species. Some of the commonly known synonyms for genus Bromus include cheatgrass, foxtail grass, rescue grass, and squirreltail grass. These synonyms are based on their characteristics of either the stem, leaf blades, awns, spikelets, or the grass as a whole. Bromus species are commonly found in prairies, meadows, and along roadsides, but some species may cause ecological problems as they are known as invasive species in certain regions.