Without photos, it is difficult to confirm the identity of this weed, but it sounds like it is probably Oxalis corniculata, often called yellow woodsorrel or oxalis. It is considered a creeping perennial weed, sometimes mistaken for clover. It has yellow flowers and the mature fruit can explode ejecting seeds up to 10 feet.

Oxalis can be easily confused with clover when not in flower. It is differentiated by its small yellow flowers, heart-shaped leaflets, and lime-green to purple color.