Lesser Canary Grass, Annual Canary Grass
Introduced annual grass to 1.8m tall. Leaves with a smooth sheath at the base. Ligule a membrane without a fringe of hairs. Leaves flat, 2-30cm long, 3-13mm wide, hairless, smooth to slightly rough, edges slightly rough, with a long fine point. Spikelets green, 4-7mm long. Seeds with 0 bristles. Mature seed heads elliptical to cylindrical.
Description, photo, and line drawing of seed (Fig. 29d) in G.M. Cunningham, WE Mulham, PL Milthorpe and J H Leigh (1981 and later printings) Plants of Western New South Wales page 131
PlantNET description: http://plantnet.rbgsyd.nsw.gov.au/cgi-bin/NSWfl.pl?page=nswfl&lvl=sp&name=Phalaris~minor
ausgrass2 description: http://ausgrass2.myspecies.info/content/Phalaris-minor