Burr Medic is a yellow-flowered, usually hairless annual herb with stems up to 60 cm long. Compound leaves are alternately arranged, clover-like, having three leaflets with slightly serrated margins. Petioles about 3 cm long. Clusters of two to seven flowers are borne in winter and spring on stalks usually less than 10mm long. The greenish-brown pod is a disc-like or cylindrical burr, 2-12 mm long and up to 8 mm in diameter, made up of one to six coils. The burrs are usually densely spined, but some varieties lack spines. Widely naturalised in many situations including lawns.
Photo: Robert Whyte