Bromus L.

Ovary with a terminal hairy appendage; the hairy stigmas attached beside the appendage Bromus

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

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Awns on the lemmas 6–7 mm long. Panicle compact, 5–10 cm long. Spikelets contracted at the top, with 8–10 florets. Lemma 7–8 mm long. Annual up to 80 cm high. Widespread. Pastures; weed. Introd. from Europe. Fl. winter–spring. Soft Brome Bromus molliformis

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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