⚠ Version 1 of The Plant List has been superseded.
This name is in version 1.1 of The Plant List, record tro-27801529, with some changes.
This name is a synonym of Crataegus scabrida var. improvisa (Sarg.) J.B. Phipps.
The record derives from Tropicos which reports it as a synonym (record 27801529) with original publication details: Ontario Nat. Sci. Bull. 4: 69-70 69 1908.
Full publication details for this name can be found in IPNI: urn:lsid:ipni.org:names:68425-2.