Acacia beckleri is a decumbent, spreading or upright shrub high with reddish-brown stems and branches. The
phyllodes are lance-shaped with the narrower end towards the base, or narrowly elliptic, straight or slightly curved. The phyllodes are green to pale green, faintly veined, long and wide, tapering at the base and rounded or pointed at the end. The flowers are usually borne in spherical heads on a
peduncle mostly long, the heads in diameter with 50 to 140 dark yellow or golden-yellow flowers. Flowering occurs from May to August and the fruit is a straight, flat, reddish-brown
pod, mostly straight-sided to barely constricted between the seeds. ==Taxonomy and naming==