Holmes' hawthorn
- kingdom: Plantae
- phylum: Tracheophyta
- class: Magnoliopsida
- order: Rosales
- family: Rosaceae
- genus: Crataegus
- species: Crataegus holmesiana
Willowdale
Ontario- Beauharnois
- Longueuil
- Montréal
Quebec
Canada
Hartford- Litchfield
Connecticut- Burlington
- Milwaukee
Wisconsin
United States