This name is a synonym of Trematodon longicollis Michx..
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 35120359) with original publication details: Ann. Sci. Nat., Bot., sér. 6, 3: 178 1876.
This name was in version 1 of The Plant List, record tro-35120359.