This name is a synonym of Porophyllum obscurum (Spreng.) DC..
The record derives from TICA
(data supplied on 2012-02-11)
which reports it as a synonym (record 598ED47F-4306-4392-B065-45403C4E8B02) with original publication details: Prodr. (DC.) 5: 649 649 1836.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:239335-1.
This name was in version 1 of The Plant List, record gcc-37367.