This name is a synonym of Cypripedium × ventricosum Sw..
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 53919) with original publication details: Monogr. Orchid. 453 1908.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:625610-1.
This name was in version 1 of The Plant List, record kew-53919.