Nelumbonaceae or the lotus contains a single genus, Nelumbo, and 2 species. They are distributed in temperate and tropical regions of the Americas and Asia. Plants are aquatic with thickened starchy tubers, which are very edible. Plants multiply by rhizomes. Lacticifers are present. Leaves are held on pedicels and may be raised above or float on top of the water surfaces. Flowers are pollinated by insects, especially beetles. The closest relative to the Nelumbonaceae is the Proteaceae, interesting, but not surprising since their flower structures are quite similar to each other.
We have the genus Nelumbo represented on the wiki.