Erect annual, 10-35 cm, glabrous or pubescent. Stems not winged. Leaves all aristate, or the upper ones bearing simple tendrils; leaflets 1-paired, linear-lanceolate, 15-60 x 1-7 mm; stipules lanceolate acuminate, semi-sagittate. Flowers solitary, small, the stalk usually shorter than the petiole. Calyx 4-5 mm; teeth equal, lanceolate, 1-1 ½ x as long as tube. Corolla lavender, often with whitish wings, rarely all white, 7-9 mm. Legume linear, 35-50 x 4-5 mm, erect, glabrous or subadpressed-pubescent, obscurely nerved. Seeds 7-11, smooth. Fl. 4-5. In corn and fallow fields, nr. s. l.-1500 m.
1. Plant glabrous (rarely leaflets or legume sparsely pilose); legume 35-55 rnrn; seeds 2.8-3.8 rnrn, smooth ..var. inconspicuus (S. Europe, S.W. & C. Asia.)
1. Plant densely pubescent; legume 26-38 mm; seeds 1.8-2.5 rnm, papillose ................. var. stenophyllus (Syria, NW. and C. Iran, E. Afghanistan. )
Variable in indumentum. Forms with pubescent fruits are frequent in Inner Anatolia.