
| Celtis occidentalis Common hackberryOvate with a strongly oblique base, the 2-5" leaves are alternate, simple and have a serrated margin from the apex almost all of the way to the leaf base. The upper leaf surface is rough to the touch and also rugose due to impressed venation. The lower leaf surface is often heavily covered with large light green oval-shaped projections called nipple galls. Trees show signs of this condition soon after the leaves emerge. Heavy infestations cause distortion of the leaf blade. The leaves of this species are larger, have a rougher surface, and are serrate closer to base than those of Celtis laevigata. |
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