This name is a synonym of Lomatopodium lessingianum (Turcz.) Fisch. & C.A. Mey..
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 1704735) with original publication details: Bull. Soc. Imp. Naturalistes Moscou 14: 429 1841.
This name record (from Tropicos) was not included in version 1 of The Plant List. It is possible the same name was included from a different data source, to check this you can search for Seseli lessingianum in version 1 of The Plant List.