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 8500408) with original publication details: Univ. Calif. Publ. Bot. 4(19): 381–382 1913.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:129493-2.
This name was in version 1 of The Plant List, record tro-8500408.