Oxalis corniculata, the
creeping woodsorrel, also called
procumbent yellow sorrel or
sleeping beauty, resembles the common yellow woodsorrel,
Oxalis stricta. It is a somewhat delicate-appearing, low-growing, herbaceous plant in the family Oxalidaceae. It has a narrow, creeping stem that readily roots at the nodes. The trifoliate leaves are subdivided into three rounded leaflets and resemble a clover in shape. Some varieties have green leaves, while others
(Wikipedia)