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.^[2]

The parent species of the natural hybrid Nuphar × rubrodisca Morong

Nuphar microphylla (Pers.) Fernald

Nuphar variegata Engelm. ex Durand

Nuphar × rubrodisca
Conservation status
Apparently Secure  (NatureServe)[1]
Scientific classification
Kingdom:	Plantae
Clade:	Tracheophytes
Clade:	Angiosperms
Order:	Nymphaeales
Family:	Nymphaeaceae
Genus:	Nuphar
Species:	N. × rubrodisca
Binomial name
Nuphar × rubrodisca Morong[2]
Nuphar × rubrodisca occurs in Canada and the USA[2]
Synonyms[2]
List Castalia × rubrodisca (Morong) Greene Nuphar lutea subsp. rubrodisca (Morong) Hellq. & Wiersema Nymphaea × rubrodisca (Morong) Greene Nymphozanthus × rubrodiscus (Morong) Fernald Nuphar advena var. hybrida Peck Nuphar × hybrida (Peck) Bergmans Nymphaea × fletcheri G.Lawson Nymphaea × hybrida (Peck) Peck

Description

Vegetative characteristics

Nuphar × rubrodisca has 1–2.5 cm wide rhizomes. The petiolate leaves float on the water surface, or are more rarely submersed.^[3] The submerged leaves are orbicular.^[4]

Generative characteristics

The red stigmatic disk has 8-15 stigmatic rays.^[5]

Reproduction

Vegetative reproduction

It can reproduce vegetatively through rhizome fragments.^[6]

Generative reproduction

It can be sterile or fertile.^[3] The fertility rates are much lower than those of the parental species.^[6]

Taxonomy

Publication

It was first described by Thomas Morong in 1886.^[2]

Natural hybridisation

Hybridisation events of both parental species are believed to have occurred many times independently from each other.^[6]

Conservation

The NatureServe conservation status is T4 Apparently Secure.^[1]

Ecology

Habitat

It occurs in streams, tidal waters, ponds, and lakes at elevations of 0–400 m above sea level.^[3] It occurs almost exclusively within the overlapping ranges of the parental species.^[6]