[1] The lower leaves of young plants are trifoliolate, the others unifoliolate, stipitate, alternate and opposite; stipular organ traversed by 3 confluent ribs at the apex.

Calyx 4.5-7(7.5) mm, campanulate, bilabiate, villous or sericeous, with the tube shorter than the lips.

Ovary sericeous or villous, with 3-6 seminal rudiments; style glabrous, arched at apex; stigma capitate, extrorse or subterminal.

[2] Fruit 8-24 × 3.7-4.5(6) mm, oblongoid, somewhat flattened and torulose, sericeous or villous, silvery, with 2-4 seeds.

Found on marly or schistose slopes, thickets on calcareous and stony hills.