Serviceberry is a small deciduous tree with alternate or finely serrated leaves, 2 to 10 centimeters (0.7 to 3.9 in) long and 1 to 4 centimeters (0.3 to 1.5 in) across. The fossilized serviceberry leaf pictured has also the same features, but lived 50 million years ago, during the Eocene period. This is obvious evidence that this tree has not undergone any evolution. With its leaves and flowers, serviceberry retains the same features as the day it was first created.