This name is a synonym of Pseudolysimachion rotundum subsp. coreanum (Nakai) D.Y. Hong.
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 29207834) with original publication details: Bot. Mag. (Tokyo) 32(382): 228 1918.
This name was in version 1 of The Plant List, record tro-29207834.