This name is a synonym of Pseudolysimachion kiusianum (Furumi) Holub.
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 29205750) with original publication details: J. Jap. Bot. 17(4): 238–239 1941.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:812028-1.
This name was in version 1 of The Plant List, record tro-29205750.