This name is a synonym of Helianthus silphioides Nutt..
The record derives from TICA
(data supplied on 2012-02-11)
which reports it as a synonym (record B64FA715-3518-48D0-AA27-0155AF9A63E2) with original publication details: 1924.
This name was in version 1 of The Plant List, record gcc-708, and has not been changed.