Placed in Ulmaceae in Michigan Flora.
1. Fruiting pedicels ca. 10–20 mm long, at least 1.5 times as long as the subtending petiole; ripe drupes dark purple, coarsely and strongly wrinkled when dry; leaves mostly with acuminate apex and margins toothed nearly to the base.
1. Fruiting pedicels ca. 3–10 (–13) mm long, shorter than to slightly exceeding the subtending petiole; ripe drupes orange-brown, remaining plump and smooth when dry; leaves mostly broadly acute to short-acuminate, the margins often entire or nearly so on basal third.
All species found in Celtis
MICHIGAN FLORA ONLINE. A. A. Reznicek, E. G. Voss, & B. S. Walters. February 2011. University of Michigan. Web. October 18, 2017. http://michiganflora.net/genus.aspx?id=Celtis.