Perennial grass to 1m tall. Leaves mostly at the base of the plant, with a hairless sheath at the base. Ligule a fringe of hairs. Leaves 4-27cm long, to 2mm wide, folded together lengthwise, hairless, the tip very sharply pointed. Flower heads brown, maturing staw-coloured. Spikelets 5-23mm long. Mature seed groups cylindrical to somewhat spreading. Seeds with 0 bristles.
Description and photo (pages 149-50) and line drawings of seeds (page 150 Fig. 34b) (as Triodia irritans var. laxispicata) in G.M. Cunningham, WE Mulham, PL Milthorpe and J H Leigh (1981 and later printings) Plants of Western New South Wales
ausgrass2 description, photo, and line drawings: http://ausgrass2.myspecies.info/content/triodia-scariosa