Setaria P.Beauv.

Bristles left on the rhachis when spikelets fall Setaria

Inflorescence spike-like, up to 15 cm long. Leaf blades less than 2 cm wide

Spikelets seated directly on the main axis, or apparently so

Bristles several below each spikelet

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Inflorescence (including bristles) 10–15 mm diam., 2–8 cm long. Bristles 6 mm long. Annual up to 1 m high. Widespread. Weed. Introd. from Europe, temperate Asia. Pale Pigeon Grass Setaria pumila

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Inflorescence (including bristles) less than 10 mm diam.