This name is a synonym of Veronica officinalis f. albiflora (G. Don) House.
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 50326684).
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:264740-2.
This name was in version 1 of The Plant List, record tro-50326684, and has not been changed.