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 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