Nuphar japonica
Nuphar japonica DC.

Nuphar japonica is a perennial, aquatic, rhizomatous herb in the family Nymphaeaceae, native to Japan, Korea, and Russia.
Description
Nuphar japonica, known as East Asian yellow water-lily, belongs to the genus Nuphar and the family Nymphaeaceae. It is distributed across the Palaearctic region, including Denmark, India, Taiwan, Japan, Korea, Primorye, and Sakhalin. The species was first described in 1821 by DC. This aquatic plant grows from rhizomes and is adapted to freshwater environments. It is part of the water lily family, which includes other aquatic plants with similar ecological roles.
Distribution
Palaearctic · DK · Denmark · SE · IN · TW · Japan · Korea · Primorye · Sakhalin
Synonyms
Nymphozanthus japonicusNymphaea japonicaNuphar japonica var. crenataNuphar japonica subvar. luteaNuphar japonica subvar. rubrotinctaNuphar japonica var. stenophyllaNuphar subintegerrima f. rubrotinctaNuphar japonica f. rubrotinctaNuphar japonica var. rubrotincta