This name is a synonym of Crataegus oxyacantha var. pteridifolia Lodd. ex Loudon.
The record derives from RJP
(data supplied on 2011-10-18)
which reports it as a synonym and as a spelling variant (record 18540) with original publication details: ; .
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 pterifolia in version 1 of The Plant List.