Also called Copenhagen hawthorn and Lange's thorn.  Part of hawthorn / thornapple  genus Crataegus in rose  family Rosaceae and order Rosales.

Native to eastern 🇨🇦 Canada and 🇺🇸 USA.

Crataegus hosts caterpillars of 160 species
of butterflies and moths, in some areas.

Learn more about thicket hawthorn Crataegus intricata

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