All three families are carnivorous plant families. The Droseraceae contains three extant genera: Drosera (sundews), which catch insects with adhesive droplets; and Dionaea (Venus flytrap) and Aldrovanda (waterwheel plant), which capture them in leaves with interlocking teeth. The other two families include pitcher plants, which drown their prey.
APG IV system
- Reveal, James L. (2011). "New ordinal names established by changes to the botanical code". Phytotaxa. 30: 42–44.
- Angiosperm Phylogeny Group (2003). An update of the Angiosperm Phylogeny Group classification for the orders and families of flowering plants: APG II. Botanical Journal of the Linnean Society 141(4): 399-436. doi: 10.1046/j.1095-8339.2003.t01-1-00158.x