This name is a synonym of Helianthus praecox Engelm. & A.Gray.
The record derives from TICA
(data supplied on 2012-02-11)
which reports it as a synonym (record 29769B68-6F5D-40EA-91FE-B951FA8E1CC6) with original publication details: Madroño 13: 160 160 1956.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:119094-2.
This name was in version 1 of The Plant List, record gcc-63762.