This name is a synonym of Seseli montanum subsp. polyphyllum (Ten.) P.W.Ball.
The record derives from WCSP (in review)
(data supplied on 2012-03-23)
which reports it as a synonym with original publication details: Index Seminum (NAP) 1825: 12 1825.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:848667-1.
This name was in version 1 of The Plant List, record kew-2479260.