Oxalis corniculata - the creeping woodsorrel - is an herbaceous plant in the family Oxalidaceae. It is a delicate low-growing flowering plant with a narrow, creeping stem that readily roots at the nodes, and trifoliate leaves subdivided into three rounded leaflets, resembling a clover in shape. Some varieties have green leaves, while others, like O. corniculata var. atropurpurea, have purple. It is regarded as a weed in gardens and agricultural fields.