This name is a synonym of Xanthosoma riedelianum (Schott) Schott.
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 339899) with original publication details: Pflanzenr. IV, 23E: 132 1920.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:269340-2.
This name was in version 1 of The Plant List, record kew-339899, and has not been changed.