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 53949) with original publication details: Rhodora 48: 4 1946.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:75345-2.
This name was in version 1 of The Plant List, record kew-53949.