What is the common name for Pyrus calleryana?

The common name for Pyrus calleryana is indeed Callery Pear. This species is often noted for its ornamental value, particularly due to its attractive white flowers that bloom in early spring, green foliage during the summer, and vibrant red to purple hues in the fall. The Callery Pear is widely planted as a street tree in urban settings because of its relatively fast growth and adaptability to various soil types.

This tree cultivar is derived from a species native to Asia, specifically China and Vietnam. Its propensity to thrive in diverse climates contributed to its popularity in landscape architecture.

The other names provided in the choices refer to different species. For instance, Sourium is not a recognized common name; Scarlet Oak refers to Quercus coccinea, a distinct species known for its beautiful fall color, and Thundercloud Plum is a cultivar of Prunus cerasifera, known for its purple foliage. Understanding these distinctions highlights the unique characteristics of the Callery Pear, positioning it as a popular choice in horticultural practices.