There are many types of hawthorns.  Some of the more common species have tree shapes and locations:

flat top;       USA Midwest   >   dotted hawthorn Crataegus punctata
flat-ish top;  USA Midwest   >   cockspur hawthorn Crataegus crus-galli

hemispherical;  USA Midwest   >   downy hawthorn Crataegus mollis
small-ish;          USA Midwest   >   thicket hawthorn Crataegus intricata
tall thin;            USA Midwest and East   >   Washington hawthorn Crataegus phaenopyrum

Learn more about hawthorn genus Crataegus

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