Contains 2 genera and 3 accepted taxa overall.
This family is completely databased for all specimens.
[Family identification key]
1. Leaves all floating or emergent, peltate (3.5-12 cm long); perianth dull purple; stamens 12 or more
1. Submersed leaves numerous and deeply dissected (when present, floating leaves peltate and 0.5-3 cm long); perianth white to bluish, sometimes with violet markings; stamens 3-6