This name is a synonym of Cypripedium parviflorum var. makasin (Farw.) Sheviak.
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 54330) with original publication details: Rep. (Annual) Michigan Acad. Sci. 18: 198 1918.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:75383-2.
This name was in version 1 of The Plant List, record kew-54330, and has not been changed.