Nuphar × rubrodisca

Nuphar × 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.

Vegetative characteristics
Nuphar × rubrodisca has 1–2.5 cm wide rhizomes. The petiolate leaves float on the water surface, or are more rarely submersed.

Generative characteristics
The red stigmatic disk has 8-15 stigmatic rays.

Vegetative reproduction
It can reproduce vegetatively through rhizome fragments.

Generative reproduction
It can be sterile or fertile. The fertility rates are much lower than those of the parental species.

Publication
It was first described by Thomas Morong in 1886.

Natural hybridisation
Hybridisation events of both parental species are believed to have occurred many times independently from each other.

Habitat
It occurs in streams, tidal waters, ponds, and lakes at elevations of 0–400 m above sea level. It occurs almost exclusively within the overlapping ranges of the parental species.