This name is a synonym of Sclerocarya birrea subsp. caffra (Sond.) Kokwaro.
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 1300014) with original publication details: Mém. Mus. Natl. Hist. Nat. 18: 245 1944.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:70293-1.
This name was in version 1 of The Plant List, record tro-1300014.