This name is a synonym of Roystonea regia (Kunth) O.F.Cook.
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 180137) with original publication details: Proc. Biol. Soc. Wash. 59: 29 1946.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:222799-2.
This name was in version 1 of The Plant List, record kew-180137, and has not been changed.