Black Medick

A common creeping perennial weed of turf surfaces. It has trifoliate leaves, 6mm to 20mm in length, and 6mm to 15mm in width; also having a lightly hairy stem. It prefers calcareous and well drained sandy soils. It flowers from May to September, having small yellow flowers, as well as a black fruit pod. Its scientific name is Medicago lupulina.