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 8E6FBDC1-23AB-4AE9-8239-F2741D115299).
This name record (from TICA) was not included in version 1 of The Plant List. It is possible the same name was included from a different data source, to check this you can search for Helianthus grosseserratus in version 1 of The Plant List.