This name is a synonym of Crataegus azarolus var. pontica (K.Koch) K.I.Chr..
The record derives from RJP
(data supplied on 2011-10-18)
which reports it as a synonym (record 2742) with original publication details: Flora Palaestina Flora Palaestina; 1966 20 1972.
This name record (from RJP) 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 Crataegus aronia in version 1 of The Plant List.