It can be found in US states such as New Mexico and Texas and also in Canadian provinces such as Alberta, British Columbia, and Saskatchewan.

[3] Bromus anomalus grows in tufts with culms 45–75 cm (18–30 in) tall.

Its inflorescence is an open, lanceolate panicle growing 10–15 cm (3.9–5.9 in) long.

Both upper and lower glumes are lanceolate and glabrous or slightly hairy.

Its native range is through Central America to the southern United States, from Panama up to Arizona and Texas.