Spanish Reed, Giant Reed, Bamboo, Danubian Reed, Elephant Grass
Introduced perennial grass to 8m tall. Leaves alternating up the stems, with a sheath at the base, ligule a membrane with a fringe of hairs. Leaves alternating up the stems, 5-100cm long, 10-80mm wide, hairless. Spikelets 8-15mm long, 2-7 flowered, each floret with a single short awn 1-3mm long, in a light brown or purplish dense panicle turning beige to whitish, 30-70cm long at the tops of the flowering stems. Noxious weed throughout NSW.
PlantNET description: http://plantnet.rbgsyd.nsw.gov.au/cgi-bin/NSWfl.pl?page=nswfl&lvl=sp&name=Arundo~donax
ausgrass2 description with photos and line drawings: http://ausgrass2.myspecies.info/content/Arundo-donax
Weeds of Australia Biosecurity Queensland Edition description: http://keyserver.lucidcentral.org/weeds/data/03030800-0b07-490a-8d04-0605030c0f01/media/Html/Arundo_donax.htm#Habit