Rosaceae
Crataegus
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Crataegus brainerdii Sarg.
= Crataegus seelyana
Sarg.
= Crataegus shirleyensis
Sarg.
Brainerd's hawthorn
Native
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Crataegus crus-galli L.
= Crataegus crus-galli var. exigua
(Sarg.) Eggleston
= Crataegus exigua
Sarg.
cockspur hawthorn
Introduced
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Crataegus fretalis Sarg.
= Crataegus ampla
Sarg.
Long Island Sound hawthorn
Native
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Crataegus macracantha var. macracantha Lodd. ex Loud.
= Crataegus succulenta var. macracantha
(Lodd. ex Loud.) Eggleston
largethorn hawthorn
Native
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Crataegus macrosperma Ashe
= Crataegus roanensis
Ashe
largeseed hawthorn
Native
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Crataegus monogyna Jacq.
= Crataegus curvisepala
Lindm.
= Crataegus oxyacantha
auct. non L.
English hawthorn
Introduced
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Crataegus phaenopyrum (L.f.) Medik.
= Crataegus cordata
Ait.
= Crataegus populifolia
Walt.
Washington hawthorn
Introduced
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Crataegus pringlei Sarg.
= Crataegus exclusa
Sarg.
= Crataegus pringlei var. exclusa
(Sarg.) Eggleston
Pringle's hawthorn
Native
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Crataegus pruinosa var. pruinosa (Wendl.f.) K.Koch
frosted hawthorn
Native
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Crataegus submollis Sarg.
= Crataegus arnoldiana
Sarg.
= Crataegus champlainensis
Sarg.
= Crataegus mollis
Scheele
downy hawthorn, Quebec hawthorn
Native
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Crataegus succulenta var. succulenta Schrader ex Link
= Crataegus succulenta var. laxiflora
(Sarg.) Kruschke
fleshy hawthorn
Native
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