This name is a synonym of Enicostema verticillatum (L.) Engl..
The record derives from WCSP (in review)
(data supplied on 2012-03-23)
which reports it as a synonym with original publication details: Syst. Nat. ed. 10 2: 952 1759.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:369098-1.
This name was in version 1 of The Plant List, record kew-2821804.