Bromus L. >
Spikelets less than 3.5 cm long (including the awns if present)
Spikelets mostly 2–3 cm long (including the awns), 5–10 mm wide. Awns, if present, up to 7 mm long
Awns on the lemmas less than 5 mm long. Panicle open, 10–30 cm long. Spikelets bright green, sometimes tinged with purple, often drooping. Longest of the pedicels 2–4 cm long; most spikelets on pedicels 5–10 mm long. Annual up to 1 m high, sometimes biennial. Widespread. Pastures. Introd. from America. Fl. winter–spring. Prairie Grass Bromus catharticus