A type of plant lice called psyllids can cause hackberry nipple galls.

Description Deciduous tree; it drops its leaves in fall Height: 50 to 70 feet Width: up to 50 feet Medium to fast growth Pyramidal shape in youth, spreading rounded shape in maturity Bark of young trees appears covered with bumpy warts, but the pattern changes to cork-like ridges as trees mature 2.

Jun 24, In the fall, leaves on common hackberries turn an undistinguished yellow. Although the common hackberry is a flowering tree, it’s not noted for its fancy blooms. Instead, fuzzy clusters of tiny yellowish-green flowers bloom in mid- to late-spring (April and May) and bloom for a few weeks.

Feb 19, Hackberry bears bright green leaves that turn yellow in autumn. Though not known for fall color, it does produce sweet, edible fruit that attracts birds and other wildlife such as squirrels. The dark red or purple drupes (berries) mature in late summer or early fall and persist on the tree through winter.

This tree also displays interesting shrubpruning.bar name: Celtis occidentalis. Produces small, dark red drupes about 1/3" in diameter that turn dark purple as they mature in mid-autumn. These berry-like fruit persist into the winter. Develops a broad crown with arching branches. Forms characteristic corky ridges and warts on trunk and branches.

Q: There is a big hackberry tree in my back yard that provides welcome shade to our deck; we tolerate the leaves it also drops. This fall the deck was covered with a sticky, saplike substance that turned a bright green umbrella black. It could also be seen on the leaves of nearby plants.

A: You likely have a population of frederick tree removal companies in the tree.