This name is a synonym of Grindelia adenodonta (Steyerm.) G.L.Nesom.
The record derives from TICA
(data supplied on 2012-02-11)
which reports it as a synonym (record 5FB4C27C-FD64-4C17-A97B-0F598223BE15) with original publication details: Ann. Missouri Bot. Gard. 21 467 1934.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:309066-2.
This name was in version 1 of The Plant List, record gcc-8250, and has not been changed.