Rat's Tail Couch, Short Rat's Tail Grass, Swamp Rat's Tail Grass
Perennial grass, erect to 70cm tall or sprawling. Leaves with a hairless sheath at the base. Ligule a fringe of hairs. Leaves 1-12cm long, 2-3mm wide, threadlike or flat, rarely folded lengthwise, hairless on the lower surface and often rough on the upper surface, with rough edges and a long fine point. Spikelets green, 1-3mm long. Mature seed groups cylindrical. Seeds with 0 bristles.
Description and photo in G.M. Cunningham, WE Mulham, PL Milthorpe and J H Leigh (1981 and later printings) Plants of Western New South Wales page 142
ausgrass2 description with photos and line drawings: http://ausgrass2.myspecies.info/content/sporobolus-mitchellii