Perennial grass 2-100cm tall. Leaves with hairy leaf sheaths at the base. Ligule a membrane with a fringe of hairs. Leaves 5-25cm long, 2-6mm wide, linear, flat, or edges rolled in, hairless, hairy, or rough, margins rough and sharp, tapering to a fine point. Spikelets greenish or purplish, 2-3mm long. Mature seed groups spreading. 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 pages 119-120
ausgrass2 description, photos, and line drawings: http://ausgrass2.myspecies.info/content/panicum-effusum