This name is a synonym of Grindelia pusilla (Steyerm.) G.L.Nesom.
The record derives from TICA
(data supplied on 2012-02-11)
which reports it as a synonym (record 5ADFB0F6-C689-4293-A4BE-1F218F2DC891) 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:310281-2.
This name was in version 1 of The Plant List, record gcc-16853, and has not been changed.