Pyrus calleryana, or the Callery pear, is a species of pear tree native to China and Vietnam, in the family Rosaceae. It is most commonly known for its cultivar 'Bradford', widely planted and increasingly regarded as an invasive species.
Pyrus calleryana is deciduous, growing to 5 to 8 m (16 to 26 ft) tall, often with a conical to rounded crown. The leaves are oval, 4 to 8 cm (1 1⁄2 to 3 in) long, glossy dark green above, on long pedicels that make them flash their slightly paler undersides in a breeze. The white, five-petaled flowers are about 2 to 2.5 cm (3⁄4 to 1 in) in diameter. They are produced abundantly in early spring before the leaves expand fully. The inedible fruits of the Callery pear are small (less than one cm in diameter), and hard, almost woody, until softened by frost, after which they are readily taken by birds, which disperse the seeds in their droppings. In summer, the shining foliage is dark green and very smooth, and in autumn the leaves commonly turn brilliant colors, ranging from yellow and orange to more commonly red, pink, purple, and bronze.