Hackberry

Celtis (Hackberry) is a genus of about 60-70 species of deciduous trees widespread in warm temperate regions of the Northern Hemisphere, in southern Europe, southern and eastern Asia, and southern and central North America, south to central Africa, and northern and central South America. The genus is present in the fossil record at least since the Miocene of Europe.
Previously included either in the elm family (Ulmaceae) or a separate family, Celtidaceae, the APG II system places Celtis in the hemp family (Cannabaceae). The generic name originated in Latin and was applied by Pliny the Elder (23-79) to the unrelated Ziziphus lotus.