This name is a synonym of Heterotheca subaxillaris (Lam.) Britton & Rusby.
The record derives from TICA
(data supplied on 2012-02-11)
which reports it as a synonym (record 93C24E86-274B-40F1-963F-2D8C2CD6AFCC) with original publication details: 131 1821.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:121454-2.
This name was in version 1 of The Plant List, record gcc-24657.