Stamens with subulate or filiform filaments and extrorse versatile anthers. Seeds minute, anatropous, stipitate. Four genera and about 100 species. Three genera are monotypic, Aldrovanda, and Drosophyllum of the old world, Dionaea of the se. Stamens 4-8, as many as the petals.
Styles usually bipartite to the base.
Ovules subglobose or ovoid in 2-5 rows on each placenta. Capsule usually 3-valved. Testa loose, variously reticulated and ornamented. Inflorescence a scorpioid cyme nodding at the undeveloped apex. The seeds and stipules are useful in identification .