This name is a synonym of Adenostemma lavenia (L.) Kuntze.
The record derives from TICA
(data supplied on 2012-02-11)
which reports it as a synonym (record AFC2864F-AA40-4821-88B5-98CA76E45310) with original publication details: Num. List Dr. .
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 Lavenia dentata in version 1 of The Plant List.