This name is a synonym of Pseudocalyx saccatus Radlk..
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 101179) with original publication details: J. Linn. Soc., Bot. 25: 338 1890.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:56249-1.
This name was in version 1 of The Plant List, record tro-101179.