Lotus, (Medicus) Willk.

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 : 176

Sect. Lotea (Medicus) Willk. Calyx bilabiate; corolla yellow; style not toothed. 20-23. L. creticus group. Perennials up to 50 cm, glabrous to densely sericeous. Leaflets obovate to oblong-oblanceolate. Heads (l-)2- to 6-flowered. Upper 2 calyx-teeth curved upwards, lateral 2 shorter than the lower. Legume 20-50 x 1-5-2 mm. 1 Lateral calyx-teeth acute, only slightly shorter than the upper; keel with a long straight beak

2 Leaflets densely sericeous; keel with a purple beak 22. creticus

2 Leaflets subglabrous to pubescent; keel with a yellow or brownish-yellow beak 23. collinus

1 Lateral calyx-teeth obtuse, much shorter than the upper; keel with a short, curved beak

3 Legume straight or slightly curved 20. cytisoides

3 Legume curved in a semi-circle or circle 21. drepanocarpus