This name is a synonym of Helianthus grosseserratus M.Martens.
The record derives from TICA
(data supplied on 2012-02-11)
which reports it as a synonym (record 83C1B1FB-FC4A-4057-A7FF-F5D9EAAEC4CF) with original publication details: Rhodora 56: 199 199 1954.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:119137-2.
This name was in version 1 of The Plant List, record gcc-71393.