This name is a synonym of Helianthus giganteus L..
The record derives from TICA
(data supplied on 2012-02-11)
which reports it as a synonym (record 9338017E-FF94-4AD3-B431-587A163C8CA1).
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:1011707-2.
This name was in version 1 of The Plant List, record gcc-47760.