This name is a synonym of Iris prismatica Pursh.
The record derives from iPlants
(data supplied on 2012-03-23)
which reports it as a synonym (record 322256) with original publication details: Rhodora 49: 133 1947.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:130122-2.
This name was in version 1 of The Plant List, record kew-322256.