This name is a synonym of Euphorbia drupifera Thonn..
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 12804158) with original publication details: Hooker's Icon. Pl. 23, t. 2823 1906.
This name record (from Tropicos) was not included in version 1 of The Plant List. It is possible the same name was included from a different data source, to check this you can search for Euphorbia drupifera in version 1 of The Plant List.