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 8500994) with original publication details: Fl. Peruv. 2: 11, t. 119 1799.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:268723-1.
This name was in version 1 of The Plant List, record tro-8500994.