| Nuphar oguraensis | |
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Scientific classification 
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| Kingdom: | Plantae |
| Clade: | Tracheophytes |
| Clade: | Angiosperms |
| Order: | Nymphaeales |
| Family: | Nymphaeaceae |
| Genus: | Nuphar |
| Species: | N. oguraensis |
| Binomial name | |
| Nuphar oguraensis Miki | |
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| Nuphar oguraensis is endemic to Japan | |
| Synonyms | |
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Nuphar oguraensis is a species of rhizomatous aquatic plant endemic to Japan.
Description
Vegetative characteristics
The petiolate, green, ovate floating leaves are 7.5-11.5 cm long, and 6-9 cm wide. The petiole is 1-3 mm wide. The petiole is semi-hollow.
Generative characteristics
The flowers are 1.7-2.5 cm wide. The 2.5-3 cm long, and 1.5-2 cm wide fruit bears brown, 3.5-4 mm long, and 2.5 mm wide seeds.
Reproduction
Generative reproduction
Flowering occurs from June to October.
Taxonomy
Publication
It was first described by Shigeru Miki in 1934.
Type specimen
The lectotype is an illustration of this species in the original publication by Shigeru Miki.
Natural hybridisation
It has been speculated to be of hybrid origin involving Nuphar pumila and Nuphar japonica.
Conservation
It is threatened by urbanisation and land development. It is regarded as a vulnerable species.
Ecology
Habitat
It occurs in rivers, lakes, ponds, and ditches.
References
- ^ "Nuphar oguraensis Miki". Plants of the World Online. Royal Botanic Gardens, Kew. Retrieved 19 January 2024.
- ^ Padgett, D. J. (2007). A MONOGRAPH OF NUPHAR (NYMPHAEACEAE). Rhodora, 109(937), 1–95. http://www.jstor.org/stable/23314744
- Padgett, D. J. (2003). Phenetic studies in Nuphar Sm. (Nymphaeaceae): variation in sect. Nuphar. Plant Systematics and Evolution, 239(3/4), 187–197. http://www.jstor.org/stable/23645175
- PADGETT, D. J. (1999). NOMENCLATURAL NOVELTIES IN NUPHAR (NYMPHAEACEAE). SIDA, Contributions to Botany, 18(3), 823–826. http://www.jstor.org/stable/41968902
| Taxon identifiers | |
|---|---|
| Nuphar oguraensis | |
| Nuphar oguraensis var. akiensis | |