Nuphar × saijoensis
Species of perennial aquatic plant
From Wikipedia, the free encyclopedia
Nuphar × saijoensis is a species of rhizomatous aquatic plant endemic to Japan.[1] It is a natural hybrid of Nuphar japonica and Nuphar pumila,[1][2] or Nuphar japonica and Nuphar pumila subsp. oguraensis.[3][4][5][6]
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| Nuphar × saijoensis | |
|---|---|
Scientific classification  | |
| Kingdom: | Plantae |
| Clade: | Embryophytes |
| Clade: | Tracheophytes |
| Clade: | Angiosperms |
| Order: | Nymphaeales |
| Family: | Nymphaeaceae |
| Genus: | Nuphar |
| Section: | Nuphar sect. Nuphar |
| Species: | N. × saijoensis |
| Binomial name | |
| Nuphar × saijoensis (Shimoda) Padgett & Shimoda[1] | |
_(W3).svg) | |
| Nuphar × saijoensis is endemic to Japan[1] | |
| Synonyms[1] | |
| |
Description
Generative characteristics
The anthers are strongly recurved.[7]
Reproduction
Generative reproduction
It is fertile, but only very few, mostly unviable seeds are produced with an average of 29 seeds per fruit.[5]
Taxonomy
Publication
It was first described as the variety Nuphar japonica var. saijoensis Shimoda by Michiko Shimoda in 1991. Later, it was treated as the natural hybrid Nuphar × saijoensis (Shimoda) Padgett & Shimoda published by Donald Jay Padgett and Michiko Shimoda in 2002.[1]
Type specimen
The type specimen was collected by Michiko Shimoda in Higashi-hiroshima City, Hiroshima Prefecture, Japan on the 27th of June 1989.[7]
Natural hybridisation
Different sources list different species involved, depending on the recognition of Nuphar taxa. Nuphar japonica is listed as a parental species in all sources.[4][5][1][2] The other parental species is either listed as Nuphar oguraensis (syn. Nuphar pumila subsp. oguraensis),[3][4][5] or as Nuphar pumila.[1][2] In the original publication the second parental species Nuphar oguraensis is listed as Nuphar pumila subsp. oguraensis.[5]