Nuphar ÃÂ rubrodisca is a species of rhizomatous aquatic plant native to Canada and the USA. It is a natural hybrid of Nuphar variegata and Nuphar microphylla.
Nuphar àrubrodisca has 1âÂÂ2.5 cm wide rhizomes. The petiolate leaves float on the water surface, or are more rarely submersed. The submerged leaves are orbicular.
The red stigmatic disk has 8-15 stigmatic rays.
It can reproduce vegetatively through rhizome fragments.
It can be sterile or fertile. The fertility rates are much lower than those of the parental species.
It was first described by Thomas Morong in 1886.
Hybridisation events of both parental species are believed to have occurred many times independently from each other.
The NatureServe conservation status is T4 Apparently Secure.
It occurs in streams, tidal waters, ponds, and lakes at elevations of 0âÂÂ400 m above sea level. It occurs almost exclusively within the overlapping ranges of the parental species.