This name is a synonym of Helianthus hirsutus Raf..
The record derives from TICA
(data supplied on 2012-02-11)
which reports it as a synonym (record 8AB638DA-1CA5-467F-9858-D0B7FFF03739).
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 strumosus in version 1 of The Plant List.