Phalaris L.

Male or sterile lemma awnless or with a terminal awn Phalaris

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Spikelets not in groups; all with 1 bisexual floret.

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Panicle cylindrical, more than twice as long as broad

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Panicle lobed, with conspicuous branches, usually interrupted, 5–25 cm long.

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Panicle cylindrical, neither lobed nor interrupted, 5–40 cm long. Spikelets densely crowded, 3.5–7.5 mm long. Robust perennial to 2 m high