Crotalaria macrocarpa is an erect bushy shrublet that can reach heights between 0.3-1.5m tall the branches are finely hairy. The dark green leaves are furry beneath and the flowers borne between October and May arenborne in many flowered inflorescence spikes they are a golden yellow colour and the flowers are about 20mm large.
Crotalaria macrocarpa is a hardy, showy shrub ideal for any garden, attracting butterflies. It has larger fruit than the other species with the pods around 25-45mm x14-18mm.