This name is a synonym of Cosmos parviflorus (Jacq.) Pers..
The record derives from TICA
(data supplied on 2012-02-11)
which reports it as a synonym (record 1C875DF8-FDE6-43A8-8BCB-E74ED142DC67) with original publication details: Smithsonian Contr. Knowl. 5(6) 90 1853.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:66741-2.
This name was in version 1 of The Plant List, record gcc-69558, and has not been changed.