This name is a synonym of Synthyris missurica (Raf.) Pennell.
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 50111936) with original publication details: Amer. Monthly Mag. & Crit. Rev. 3: 175 1818.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:264736-2.
This name was in version 1 of The Plant List, record tro-50111936.