Crataegus macrosperma Ashe. Eastern Hawthorn. Phen: Apr-early May; Sep-Oct. Hab: Mesic to subxeric hardwood forests, wooded slopes, rock outcrops, pastures, thickets, mountain balds and rocky summits. Dist: ME to MN, south to GA, AL, AR; C. macrosperma is widespread, particularly common in the Appalachians.

ID notes: C. macrosperma is consistent in its adaxially lightly scabrous-pubescent young leaves, 5-10 stamens, and soft-textured mature fruit. The pyrenes are not unusually large (5-8 mm), so the epithet is somewhat a misnomer.

Origin/Endemic status: Native

Synonymy: = Ar, FNA9, K1, K3, NY, Pa, Tat, Tn, W, Lance (2014); > Crataegus brainerdii Sarg. – C, Pa, misapplied to material in our area; < Crataegus flabellata (Bosc ex Spach) K.Koch – RAB; > Crataegus flabellata (Bosc ex Spach) K.Koch – C; > Crataegus fluviatilis – Mi; < Crataegus macrosperma Ashe – S; > Crataegus macrosperma Ashe – S13; > Crataegus macrosperma Ashe var. macrosperma – F, G; > Crataegus macrosperma Ashe var. roanensis (Ashe) E.J.Palmer – F, G; > Crataegus roanensis Ashe – S13

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Heliophily ?: 6