This name is a synonym of Gaultheria pumila var. leucocarpa (DC.) D.J.Middleton.
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 12302487) with original publication details: Revista Univ. (Santiago) 34: 161 1949.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:190563-2.
This name was in version 1 of The Plant List, record tro-12302487.