annual, diffuse or scandent. Leaves multisect, segments narrow. Flowers small,
white, rosy or purplish, in terminal or leaf-opposed racemes. Sepals 2, small.
Petals 4, erect or connivent, outer 2 dissimilar, lower flat or concave, upper
gibbous or spurred at base, inner 2 clawed, keeled, tip free or coherent.
Stamens 6, diadelphous, with a basal spur enclosed in spur of the petals. Ovary
1-celled, styles filiform, stigmas entire or shortly 2 lobed. Fruit subglobose capsule, 1-seeded, indehiscent.