This name is a synonym of Laserpitium siler subsp. zernyi (Hayek) Tutin.
The record derives from WCSP (in review)
(data supplied on 2012-03-23)
which reports it as a synonym with original publication details: Monde Pl. 26(153): 4 1925.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:848862-1.
This name was in version 1 of The Plant List, record kew-2479322.