This name is a synonym of Paphiopedilum × siamense (Rolfe) Rolfe.
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 54370) with original publication details: Gard. Chron. 1890(1): 161 1890.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:625964-1.
This name was in version 1 of The Plant List, record kew-54370, and has not been changed.