This name is a synonym of Hybanthus calceolaria (L.) Oken.
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 50073547) with original publication details: Fasc. Pl. 7, t. 1 1771.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:867059-1.
This name was in version 1 of The Plant List, record tro-50073547.