Bromus berteroanus, commonly known as Chilean chess, is a species of annual grass in the family Poaceae native to drier areas of North and South America.

[2] Bromus berteroanus has culms 10 to 80 cm (3.9 to 31.5 in) long, with lightly hairy leaf sheaths and hairless ligules.

Its inflorescence is a dense panicle of 5 to 15 cm (2.0 to 5.9 in), with branches which are lightly rough to the touch.

Its glumes are shorter than the spikelets and thinner than fertile lemmas.

[3] Bromus berteroanus is named after its occurrence in Chile, though it is native across western South America; it is native to Ecuador, Peru, Chile, Bolivia, and Argentina, and it has been introduced to the western United States from Oregon through California down to Baja California and east to Utah and Nevada.