Shrub to 2.5m tall. 'Leaves' alternating up the stems, 3-8cm long, 4-15mm wide, flat, hairy when young, with a straight, sometimes sharp point. Flower heads globular, yellow, in pairs, the stalks arising from the bases of the 'leaves'.
PlantNET description with line drawing and photo: http://plantnet.rbgsyd.nsw.gov.au/cgi-bin/NSWfl.pl?page=nswfl&lvl=sp&name=Acacia~halliana
World Wide Wattle line drawings and photos: http://www.worldwidewattle.com/imagegallery/image.php?p=0&l=h&id=23672&o=1