*Richardia brasiliensis Gomes

Mericarps with large papillae; adaxial face with a raised ridge, 2–3 mm long. Leaves elliptic to ovate or obovate, up to 5 cm long. Flowers c. 20 or more per head. Corolla mostly 6-lobed; tube 3–8 mm long. Prostrate to ascending annual with stems up to 50 cm long. Coast. Weed of waste places and cultivation. Introd. from S. America. Fl. spring–autumn. Mexican Clover or Brazil Weed