This name is a synonym of Helianthus nuttallii subsp. parishii (A.Gray) Heiser.
The record derives from TICA
(data supplied on 2012-02-11)
which reports it as a synonym (record FC826201-3647-4E00-A5AB-771D0099D76B) with original publication details: 7 1883.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:119210-2.
This name was in version 1 of The Plant List, record gcc-84705.