Bromus catharticus

Bromus catharticus is a species of brome grass known by the common names rescuegrass, grazing brome, prairie grass, and Schrader's bromegrass. The specific epithet catharticus is Latin, meaning cathartic. The common name rescuegrass refers to the ability of the grass to provide forage after harsh droughts or severe winters. The grass has a diploid number of 42.

It is native to South America but it can be found in other places, including Europe, Australia and North America, as an introduced species.

Description
Bromus catharticus is a coarse winter annual or biennial grass, growing 0.2-1 m in height. The culms of the grass are glabrous and 2-4 mm thick. The sheaths are densely hairy. The grass lacks auricles and the glabrous ligule is 1-4 mm long. The leaf blades are 4-30 cm long and 3-10 mm wide and are glabrous or pubescent. The erect or nodding panicles are 9-28 cm long. The upper spikelets are erect and the lower spikelets are nodding or drooping. Each flat and pointed spikelet is 20-40 mm long and has four to twelve florets. The glumes are smooth or occasionally slightly scabrous. The lower glume is fie to seven-veined and 7-12 mm long, and the upper glume is seven to nine-veined and 9-17 mm long. The lemmas are scabrous or nearly glabrous and lack awns or possess very short awns 2 mm in length. The lemmas are 11-20 mm long. The palea is over half the length of the lemma. The anthers are 0.5-5 mm long.

Habitat
Bromus catharticus grows in open and disturbed areas.