Echinochloa P.Beauv.

Glumes stiff-hispid; spikelets ± loosely arranged on one side of the rhachis Echinochloa
Spikelets awnless
Fruit 1.4–2 mm long, 1.1–1.6 mm wide. Panicle less compact, if densely crowded then more openly spreading
Spikelets 2–3 mm long, usually violet tinged and conspicuously hispid, awned or awnless. Hairs present at the base of the inflorescence branches. Culms up to 90 cm high. Widespread. Garden weed; pastures. Introd. from tropics. Fl. summer. Barnyard Grass Echinochloa crus-galli
Spikelets c. 3 mm long, green, awnless. Bases of inflorescence branches pubescent or with a few bristles. Culms up to 60 cm high. Coast and Cumberland Plain. Garden weed; pastures, particularly on clay soils and floodways. Fl. summer. Awnless Barnyard Grass Echinochloa colona