This name is a synonym of Nautilocalyx pictus (Hook.) Sprague.
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 50261039) with original publication details: Bull. Misc. Inform. Kew 1931: 489 1931.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:167428-2.
This name was in version 1 of The Plant List, record tro-50261039, and has not been changed.