| Nuphar oguraensis | |
|---|---|
Scientific classification  | |
| Kingdom: | Plantae |
| Clade: | Tracheophytes |
| Clade: | Angiosperms |
| Order: | Nymphaeales |
| Family: | Nymphaeaceae |
| Genus: | Nuphar |
| Section: | Nuphar sect. Nuphar |
| Species: | N. oguraensis |
| Binomial name | |
| Nuphar oguraensis Miki [1] | |
 | |
| Nuphar oguraensis is endemic to Japan [1] | |
| Synonyms [1] | |
| |
Nuphar oguraensis is a species of rhizomatous aquatic plant endemic to Japan. [1]
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. [2] The petiole is semi-hollow. [3]
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. [2]
Flowering occurs from June to October. [2]
It was first described by Shigeru Miki in 1934. [1]
The lectotype is an illustration of this species in the original publication by Shigeru Miki. [2] [4]
It has been speculated to be of hybrid origin involving Nuphar pumila and Nuphar japonica . [2]
It is threatened by urbanisation and land development. It is regarded as a vulnerable species. [2]
It occurs in rivers, lakes, ponds, and ditches. [2]
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