Sour cherry tree is a popular fruit tree known for its tart and tangy flavor. There are many different synonyms for the sour cherry tree, including the Morello cherry tree, the pie cherry tree, and the tart cherry tree. These all refer to the same fruit tree and are widely cultivated for their unique, flavorful fruit. The sour cherry tree is a deciduous tree that grows up to 30 feet tall and is native to parts of Europe and Asia. Its fruit is smaller and less sweet than sweet cherries, making it a popular choice for baking and cooking. Whether you call it the sour cherry tree, the Morello cherry tree, or the tart cherry tree, this fruit tree is an essential part of many gardens and orchards.