Celtis speciesDescription: Hackberry trees have smooth, gray bark that often has corky warts or ridges. The tree may reach 39 meters in height. Hackberry trees have long-pointed leaves that grow in two rows. This tree bears small, round berries that can be eaten when they are ripe and fall from the tree. The wood of the hackberry is yellowish.Habitat and Distribution: This plant is widespread in the United States, especially in and near ponds.Edible Parts: Its berries are edible when they are ripe and fall from the tree.