This name is a synonym of Hymenocallis littoralis (Jacq.) Salisb..
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 50293363) with original publication details: Bot. Mag. 53: sub t. 2621 1826.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:125533-2.
This name was in version 1 of The Plant List, record tro-50293363.