This name is a synonym of Helianthus praecox subsp. runyonii (Heiser) Heiser.
The record derives from TICA
(data supplied on 2012-02-11)
which reports it as a synonym (record A32D2585-56F2-4973-9A39-8C775ADB3772) with original publication details: Madroño 13: 161 161 1956.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:119095-2.
This name was in version 1 of The Plant List, record gcc-58184, and has not been changed.