Nuphars japonica var. variegata ( Nuphar )
The more than thirty species of Nuphar , all distributed throughout the northerly cerebral hemisphere , include the common yellow water lily , cow lily or spatterdock of North America and brandy nursing bottle of Eurasia . Hardy perennials , they can be plant spring or summer , and year round in zones 8 to 10 . They prosper in various situation , from flowing piddle to stagnant pool , from water only a few inches thick to 8 feet deep , from full sunlight to full wraith ....