Flower heads are small and made up of 40 to 50 pea like yellow flowers, hairy trefoil (3 leaved) leaves and stems. At the end of each leaf is a small point. Seed pods coil and turn black when ripe. Annual wildflower that is an excellent Nectar Plant for butterflies, bees and moths. Height 35-45cm. Flowers April to September. Yellow wildflower. Medicago lupulina.