This name is a synonym of Wedelia urticifolia (Blume) DC..
The record derives from TICA
(data supplied on 2012-02-11)
which reports it as a synonym (record 9B14885A-7BD4-43CA-9EFA-716C873ED094).
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 wallichii in version 1 of The Plant List.