Annual herbs (in ours). Flowers yellow. Sepals spreading horizontally, not saccate. Petals 4, unguiculate. Stamens 6. Fruit terete with convex valves, each 3-7-veined and with a long beak with 0-4(-9) seeds. Seeds in 1 series, subspherical.
Worldwide: 7 species in Europe and the Mediterranean