Acacia concinna is a climbing, most well-known for the natural shampoo derived from its fruit. Thorny branches have brown smooth stripes - thorns are short, broad-based, flattened. Leaves with caducous stipules not thorn-like. Leaf stalks are 1-1.5 cm long with a prominent gland about the middle. Leaves are double-pinnate, with 5-7 pairs of pinnae, the primary rachis being thorny, velvety. Each pinnae has 12-18 pairs of leaflets, which are oblong-lanceshaped, 3-10 mm long, pointed, obliquely rounded at base. Inflorescences is a cluster of 2 or 3 stalked rounded flower-heads in axils of upper reduced leaves, appearing paniculate. Stalk carrying the cluster is 1-2.5 cm long, velvety. Flower-heads about 1 cm in diameter when mature. Flowers are pink, without or with reduced subtending bracts. Pods are thick, somewhat flattened, stalked, 8 cm long, 1.5-1.8 cm wide.