Common Reed, Bamboo Reed, Canegrass
Perennial grass to 6m tall. Leaves mostly alternating up the stems. Leaf with a sheath at the base. Ligule a membrane with a fringe of hairs. Leaves flat, 20-60cm long, 8-45mm wide, hairless, tapering to a fine point. Spikelets green, becoming purplish brown, silvery white to pale brown at maturity, 10-18mm long. Mature seed groups oval to spreading. Seeds hairy, with a long point which looks like a short bristle, 2-11 per spikelet.
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 132
ausgrass2 description with line drawings and photos: http://ausgrass2.myspecies.info/content/Phragmites-australis