This name is a synonym of Cypripedium macranthon f. albiflorum (Makino) Ohwi.
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 50238720) with original publication details: Jap. J. Bot. 3: 27 1906.
This name was in version 1 of The Plant List, record tro-50238720.