Small to large perennial shrubs; stems and branches often angular or ribbed. Leaves alternate, 1-foliolate or palmately trifoliolate, petiolate; stipules minute or absent. Flowers axillary, in leafy terminal raceme; bracts and bracteoles caducous; calyx campanulate, shallowly 5-toothed, 2-lipped, upper lip 2-toothed, lower lip 3-toothed; petals usually white or yellow; standard elliptic to more or less orbicular; wings oblong; keel oblong-falcate, obtuse, curved along lower surface; stamens monadelphous, anthers alternately long and short; ovary sessile, style upcurved to looped, stigma capitate or introrse, ovules 2 or more. Pod more or less oblong and compressed, explosively dehiscent; seeds several, arillate.
About 33 species, from Europe and northern Africa; 2 species naturalised in Australia.