This name is a synonym of Chelidonium majus subsp. grandiflorum (DC.) Printz.
The record derives from WCSP (in review)
(data supplied on 2012-03-23)
which reports it as a synonym with original publication details: Prodr. 1: 123 1824.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:672003-1.
This name was in version 1 of The Plant List, record kew-2716687, and has not been changed.