Colin Varndell / Black Medick (Medicago) flowers. Somerset, UK, May.

Angelo Gandolfi / Sea Medick (Medicago marina) flowering on sandy shore, Italy, May

Russell Cooper / Green Hairstreak Butterfly (Callophrys rubi) at rest on Black Medick (Medicago lupulina) Surrey, England, UK

Russell Cooper / Green Hairstreak Butterfly (Callophrys rubi) at rest on Black Medick (Medicago lupulina) Surrey, England, UK

Jose B. Ruiz / Sea meddick {Medicago marina} growing on sand dunes, Spain

Jose B. Ruiz / Sea medick in flower {Medicago marina} Alicante, Spain

Pascal Tordeux / Black Medic (Medicago lupulina). Queyras, France, July.

Nature Production / Alfalfa plant in flower {Medicago sativa} Hokkaido, Japan