This name is a synonym of Cardamine pratensis subsp. paludosa (Knaf) Celak..
The record derives from WCSP (in review)
(data supplied on 2012-03-23)
which reports it as a synonym with original publication details: Observ. Bot. 126 1809.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:280267-1.
This name was in version 1 of The Plant List, record kew-2699644.