This name is a synonym of Calystegia soldanella (L.) Roem. & Schult..
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 8501204) with original publication details: Sp. Pl. 1: 159 1753.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:267007-1.
This name was in version 1 of The Plant List, record tro-8501204.