This name is a synonym of Trillium erectum L..
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 292973) with original publication details: Rhodora 55: 102 1953.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:258326-2.
This name was in version 1 of The Plant List, record kew-292973.