Nuphar × spenneriana is a species of rhizomatous aquatic plant native to Europe. It is a natural hybrid of Nuphar lutea and Nuphar pumila.[1]
| Nuphar × spenneriana | |
|---|---|
Scientific classification  | |
| Kingdom: | Plantae |
| Clade: | Tracheophytes |
| Clade: | Angiosperms |
| Order: | Nymphaeales |
| Family: | Nymphaeaceae |
| Genus: | Nuphar |
| Species: | N. × spenneriana |
| Binomial name | |
| Nuphar × spenneriana Gaudin[1] | |
| Synonyms[1] | |
List
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Description
Vegetative characteristics
Nuphar × spenneriana is a perennial, rhizomatous, aquatic plant.[2] The abaxial leaf surface has trichomes towards the leaf margin.[3] The leaf has 15-22 primary nerves.[4]
Generative characteristics
The androecium consists of 60-100 stamens.[4] The stigmatic disc has 9-15 rays.[3]
Reproduction
Generative reproduction
It is fertile, but the pollen may be less viable.[5][6] Pollen fertility can reach 73%. However, it can also be as low as 14% in F1 hybrids.[6] In another case, a female sterility rate of 80%, and a male sterility rate of 85% have been reported.[7] The seeds grow more rapidly than those of the parent species.[5][7]
Taxonomy
Publication
It was first described by Jean François Aimé Théophile Philippe Gaudin in 1828.[1]
Natural hybridisation
It likely arose 10 000 years ago, when both parent species came into contact.[8] Natural hybridisation is a threat to Nuphar pumila, one of the parent species, as the hybrid replaces populations of Nuphar pumila.[5] In Eastern Europe and Asia observations of intermediate plants are rare. In Western Europe hybridisation appears to have played a more significant role.[6]
Etymology
The nothospecific epithet spenneriana honours Fridolin Carl Leopold Spenner (1798-1841).[9][10]