This name is a synonym of Bupleurum falcatum subsp. polyphyllum (Ledeb.) H.Wolff.
The record derives from WCSP (in review)
(data supplied on 2012-03-23)
which reports it as a synonym with original publication details: Pflanzenr. IV, 228: 138 1910.
This name was in version 1 of The Plant List, record kew-2686639, and has not been changed.