This name is a synonym of Rorippa palustris (L.) Besser.
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 50124575) with original publication details: Great Basin Naturalist 37(3): 348 1977.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:222151-2.
This name was in version 1 of The Plant List, record tro-50124575.