⚠ Version 1 of The Plant List has been superseded.
This name is in version 1.1 of The Plant List, record tro-22600086, with some changes.
This name is a synonym of Nuphar lutea subsp. polysepala (Engelm.) E.O. Beal.
The record derives from Tropicos which reports it as a synonym (record 22600086) with original publication details: Bull. Torrey Bot. Club 15(3): 84 84 1888.
Full publication details for this name can be found in IPNI: urn:lsid:ipni.org:names:171217-2.