This name is a synonym of Gasteria carinata var. verrucosa (Mill.) van Jaarsv..
The record derives from WCSP
(data supplied on 2012-03-26)
which reports it as a synonym (record 312506) with original publication details: Verz. Art. Aloe 19 1817.
This name was in version 1 of The Plant List, record kew-312506, and has not been changed.