This name is a synonym of Ipomoea nil (L.) Roth.
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 8503268) with original publication details: Ann. New York Acad. Sci. 18(6): 219 1908.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:129705-2.
This name was in version 1 of The Plant List, record tro-8503268.