Celtis occidentalis, (Hackberry) - 10 Gallon Potted TreeCeltis occidentalis, or Hackberry, is easily distinguished from elms and some other hackberries by its cork like bark with wart like protuberances. The leaves are distinctly asymmetrical and coarse textured. It produces small fruits that turn orange red to dark purple in the autumn, often staying on the trees for several months. The common hackberry is easily confused with the sugarberry (Celtis laevigata) and is most easily distinguished by range and