This name is a synonym of Sphagneticola gracilis (Rich.) Pruski.
The record derives from TICA
(data supplied on 2012-02-11)
which reports it as a synonym (record E8251233-2145-48E7-9C6D-E6C9716E4B89).
This name record (from TICA) was not included in version 1 of The Plant List. It is possible the same name was included from a different data source, to check this you can search for Wedelia gracilis in version 1 of The Plant List.