This name is a synonym of Argocoffeopsis rupestris subsp. thonneri (Lebrun) Robbr..
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 45746) with original publication details: Ann. Soc. Sci. Bruxelles, Sér. B 53: 150 1933.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:747282-1.
This name was in version 1 of The Plant List, record kew-45746, and has not been changed.