Crataegus calpodendron (Ehrhart) Medikus. Phen: May-early Jun; Sep-Oct. Hab: Mixed hardwood forests, open slopes, wooded ravines, streamsides, especially over basic or calcareous rocks. Dist: NY w. to MN, s. to GA, OK. This species is relatively common in its generally northern range, uncommon in its southern range extensions in uplands from VA to MO, and rare in the Coastal Plain of GA, AL.
ID notes:Often found as a solitary specimen or in small local populations. One of the latest hawthorns in our area to flower.
Origin/Endemic status: Native
Synonymy: = C, FNA9, GrPl, Il, K1, K3, Mi, NY, Pa, RAB, S, Tn, W, Lance (2014); > Crataegus calpodendron (Ehrh.) Medik. var. calpodendron – F, G; > Crataegus calpodendron (Ehrh.) Medik. var. globosa (Sarg.) E.J.Palmer – F, G; > Crataegus calpodendron (Ehrh.) Medik. var. microcarpa (Chapm.) E.J.Palmer – F, G; > Crataegus carrollensis Sarg. – Sargent (1922a); > Crataegus chapmanii Beadle – S13; > Crataegus microcarpa Chapm.; > Crataegus tomentosa Du Roi