Bromus hordeaceus is an annual to biennial C3 grass (Wand et al. 1999), 30 cm to 1 m tall, stems often finely hairy; leaf sheaths hairy, ligule to 0.2 cm.
Leaves alternate, blades hairy, 0.2-0.6 cm.
Flower spikelets 1-2.5 cm long, 6-9 flowers, usually softly hairy; glumes unequal, 0.5-0.9 cm, second glume often awned; lemma to 1 cm, apical teeth 0.1 cm, awn straight, 0.3-0.9 cm; inflorescence dense, erect, 3-10 cm, branches shorter than spikelets; blooming and fruiting May-July.
Wetland status: NL.
Frequency in NYC: infrequent.
Habitat: Roadsides, open, disturbed sites.