This name is a synonym of Priogymnanthus apertus (B.Ståhl) P.S.Green.
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 367339) with original publication details: in Fl. Ecuador 43(155-156): 54 1991.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:303238-2.
This name was in version 1 of The Plant List, record kew-367339, and has not been changed.