This name is a synonym of Crataegus chrysocarpa var. bicknellii (Eggl.) E.J. Palmer.
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 50080437) with original publication details: Bull. Torrey Bot. Club 38(5): 244 1911.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:67931-2.
This name was in version 1 of The Plant List, record tro-50080437.