This name is a synonym of Porophyllum angustissimum Gardner.
The record derives from TICA
(data supplied on 2012-02-11)
which reports it as a synonym (record 909C14F7-7D58-4298-AD65-7818D89D24C7) with original publication details: Fl. Bras. (Martius) 6(3): 285 285 1884.
This name was in version 1 of The Plant List, record gcc-85168.