This name is a synonym of Trematodon gymnostomus S.O. Lindberg ex Müll. Hal..
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 35120238) with original publication details: J. Linn. Soc., Bot. 12: 46 1869.
This name was in version 1 of The Plant List, record tro-35120238.