Medicago lupulina, L.

Tutin, T. G., Heywood, V. H., Burges, N. A., Moore, D. M., Valentine, D. H., Walters, S. M. & Webb, D. A., 1981, Flora Europaea. Volume 2. Rosaceae to Umbelliferae, Cambridge University Press : 154

1. M. lupulina L. , Sp. Pl. 779 (1753).

More or less pubescent annual or short-lived perennial 5-60 cm. Leaflets orbicular, obovate, or rhombic- or oblong-cuneate, rounded to emarginate, usually apiculate; stipules lanceolate to ovate, serrate or entire. Racemes 10- to 50-flowered. Corolla 2-3 mm. Legume 1 -5-3 mm, reniform, black when ripe; transverse veins strongly curved, slightly anastomosing and forming an elongated network. Seed 1, black. 2/ i= 16. Throughout Europe, except the extreme north; sometimes cultivated for forage. All except Sb; probably introduced in Fa Is.