Setaria P.Beauv.

Bristles left on the rhachis when spikelets fall Setaria
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Inflorescence spike-like, up to 15 cm long. Leaf blades less than 2 cm wide
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Spikelets seated directly on the main axis, or apparently so
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Bristles 1–2 (rarely 3) below each spikelet. Inflorescence 2–5 cm long, 12–15 mm diam. (including bristles), green. Annual up to 40 cm high. Widespread on ranges. Weed. Introd. from Europe. Fl. summer. Green Pigeon Grass Setaria viridis
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Bristles several below each spikelet