This name is a synonym of Cypripedium parviflorum Salisb..
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 332316) with original publication details: Orchid Rev. 15: 184 1907.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:75364-2.
This name was in version 1 of The Plant List, record kew-332316.