This name is a synonym of Crataegus viridis var. atrorubens (Ashe) E.J.Palmer.
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 50111779) with original publication details: J. Elisha Mitchell Sci. Soc. 16(2): 78–79 1899.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:67899-2.
This name was in version 1 of The Plant List, record tro-50111779.