This name is a synonym of Edmondia pinifolia (Lam.) Hilliard.
The record derives from TICA
(data supplied on 2012-02-11)
which reports it as a synonym (record B4E4C2CD-2DCA-4575-BCC4-EA68DCAA6EA8).
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 Aphelexis humilis in version 1 of The Plant List.