This name is a synonym of Helianthus occidentalis Riddell.
The record derives from TICA
(data supplied on 2012-02-11)
which reports it as a synonym (record 84C97171-FAF8-41AB-B866-C56D50E0D1AE) with original publication details: 82 1843.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:119119-2.
This name was in version 1 of The Plant List, record gcc-119559.