This name is a synonym of Ludwigia peruviana (L.) H.Hara.
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 23200997) with original publication details: Syst. Nat. (ed. 10) 2: 998 1759.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:281535-2.
This name was in version 1 of The Plant List, record tro-23200997.