This name is a synonym of Ekmanianthe longiflora (Griseb.) Urb..
The record derives from iPlants
(data supplied on 2012-03-23)
which reports it as a synonym (record 318640) with original publication details: Symb. Antill. 8: 640 1921.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:248687-2.
This name was in version 1 of The Plant List, record kew-318640, and has not been changed.