This name is a synonym of Cosmos caudatus Kunth.
The record derives from TICA
(data supplied on 2012-02-11)
which reports it as a synonym (record 4F54B416-C807-48A0-8C21-8BB9BDF086AD) with original publication details: 454 1826.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:184762-1.
This name was in version 1 of The Plant List, record gcc-93893.