The sorb apple tree is a type of tree that produces small, hard, and sour fruit, also known as a serviceberry or a Juneberry. However, there are a few other terms that can be used as synonyms for this tree. One of the most common is the shadbush, which refers to the tree's habit of blooming around the time when shad fish begin to migrate upstream. Other synonyms include the juneberry, which refers to the month in which the fruit ripens, and the wild plum, due to its resemblance to the plum tree. Whatever you call it, the sorb apple tree is an attractive tree that is prized for its delicious fruit and springtime blooms.