This name is a synonym of Peperomia tetragona Ruiz & Pav..
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 25001412) with original publication details: Publ. Field Mus. Nat. Hist., Bot. Ser. 13(2): 82 1936.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:189497-2.
This name was in version 1 of The Plant List, record tro-25001412, and has not been changed.