This name is a synonym of Seseli elatum subsp. osseum (Crantz) 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: Stirp. Austr. Fasc. 3: 92 1767.
This name was in version 1 of The Plant List, record kew-2479615.