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 ED570809-EDBD-4070-A79B-0DDB330624F6) with original publication details: Fl. Bras. (Martius) 6(3): 284 284 1884.
This name was in version 1 of The Plant List, record gcc-7455.