You selected Crataegus pyrifolia Lam. This is a synonym for:

Accepted scientific name:
Aronia arbutifolia (L.) Pers. (accepted name) 1 literature reference for Aronia arbutifolia (L.) Pers.
Synonyms: -
Infraspecific taxon: Aronia arbutifolia var. atropurpurea (Britton) C.K.Schneid.
Aronia arbutifolia var. atropurpurea (Britton) F.Seym.
Aronia arbutifolia var. baenitziana (C.K.Schneid.) C.K.Schneid.
Aronia arbutifolia var. depressa (Lindl.) C.K.Schneid.
Aronia arbutifolia forma glabra (Elliot) Uttal
Aronia arbutifolia var. glabra Elliott
Aronia arbutifolia forma leiocalyx Rehder
Aronia arbutifolia forma macrocarpa Zabel, nom. nud.
Aronia arbutifolia forma macrophylla (Hook.) Rehder
Aronia arbutifolia var. melanocarpa (Michx.) Torr.
Aronia arbutifolia var. nigra (Willd.) F.Seym.
Aronia arbutifolia var. pumila (Schmidt) Rehder
Aronia arbutifolia var. tomentosa Elliott
Common names: -
Classification:
Plantae
Phylum Magnoliophyta
Class Magnoliopsida
Order Rosales
Family Rosaceae
Genus Aronia
Distribution: -
Additional data: -
Source database: IOPI-GPC, 10.0, Aug 2007
Latest taxonomic scrutiny: R. Pankhurst, 2009
Online resource: -
CoL taxon LSID: urn:lsid:catalogueoflife.org:taxon:2be9a6c8-60a7-102d-be47-00304854f810:ac2010