Nymphoides peltata, or yellow floating heart, makes a second appearance on Botany Photo of the Day, this time with a close-up of a flower. Tamara Bonnemaison wrote an excellent entry on this species in 2015: Nymphoides peltata.
Menyanthaceae is a family of only 5 genera and approximately 60 species, two-thirds of which are in the genus Nymphoides. This family of wetland and aquatic plants has a worldwide distribution, excepting some of the most inhospitable parts of the world: the Sahara, western and central Australia, Greenland, and Antarctica. Nymphoides spans both hemispheres; Menyanthes and Nephrophyllidium are strictly Northern Hemisphere; and Liparophyllum and Villarsia are found in the Southern Hemisphere.