*Setaria viridis (L.) P.Beauv.

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