This name is a synonym of Abies sibirica subsp. semenovii (B.Fedtsch.) Farjon.
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 24900719) with original publication details: Monogr. Gen. Abies 188 1972.
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 Abies sibirica in version 1 of The Plant List.