This name is a synonym of Phyllocephalum indicum (Less.) K.Kirkman.
The record derives from TICA
(data supplied on 2012-02-11)
which reports it as a synonym (record 0B150C2C-A84C-4A11-BD6D-BA1943497681) with original publication details: Walp. Rep. 2: 948. 1843. 948 1843.
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 Gymnanthemum reticulatum in version 1 of The Plant List.