This name is a synonym of Cypripedium passerinum Richardson.
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 332319) with original publication details: Proc. & Trans. Roy. Soc. Canada III, 22(5): 168 1929.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:75379-2.
This name was in version 1 of The Plant List, record kew-332319.