This name is a synonym of Coreopsis grandiflora Hogg ex Sweet.
The record derives from TICA
(data supplied on 2012-02-11)
which reports it as a synonym (record 308E3EF9-3CE4-4039-9437-4301242CAA01) with original publication details: Bot. Gaz. 89 368 1930.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:65813-2.
This name was in version 1 of The Plant List, record gcc-36136.