Crataegus berberifolia Torrey & A. Gray var. engelmannii (Sargent) Eggleston. Engelmann's Hawthorn. Phen: Apr-May; Aug-Oct. Hab: Mixed hardwood and pine forests of uplands, usually in subxeric to xeric habitats, especially over basic to calcareous soils. Dist: Appears most common in MO and AR, mixed sporadically with the species eastward to e. TN, c. NC.

Origin/Endemic status: Native

Taxonomy Comments: Foliage is similar to typical var. berberifolia in most respects, except for a tendency to be more scabrous-pubescent and reticulate-veined; presence of 10 stamens per flower is typical. Occasional intergradation with C. crus-galli in mixed populations is evident.

Synonymy ⓘ: = FNA9, Lance (2014); = n/a – RAB; < Crataegus berberifolia Torr. & A.Gray – Ar, K3, Tn; > Crataegus engelmannii Sarg. – Il, NcTx, S13; > Crataegus sinistra Beadle – S13; > Crataegus torva Beadle – S13

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Wetland Indicator Status:

• Atlantic and Gulf Coastal Plain: FAC (taxonomic split from wetland indicator species)
• Eastern Mountains and Piedmont: FAC (taxonomic split from wetland indicator species)
• Great Plains: FAC (taxonomic split from wetland indicator species)
• Midwest: FAC (taxonomic split from wetland indicator species)
• Northcentral & Northeast: FAC (taxonomic split from wetland indicator species)

Heliophily ⓘ: 8