This name is a synonym of Gymnosporia linearis subsp. madagascariensis (Drake) Jordaan.
The record derives from WCSP (in review)
(data supplied on 2012-03-23)
which reports it as a synonym with original publication details: Hist. Phys. Madagascar 35(5 Atlas 3): t. 280B 1896.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:77074606-1.
This name was in version 1 of The Plant List, record kew-2707567, and has not been changed.