This name is a synonym of Humularia bifoliolata (Micheli) P.A.Duvign..
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 13060648) with original publication details: Bull. Soc. Roy. Bot. Belgique 36: 58 1897.
This name was in version 1 of The Plant List, record tro-13060648, and has not been changed.