Pyrus calleryana

Pyrus calleryana

Pyrus calleryana, commonly known as the Callery pear, is a species of pear native to China and Vietnam. It is a deciduous tree that grows to a height of 5–20 m (16–66 ft) with a broad, pyramidal shape. The leaves are oval, 4–7 cm (1.6–2.8 in) long, glossy dark green above, slightly paler below. The white, five-petaled flowers are produced abundantly in early spring, before the leaves expand fully.

Taxonomy

The species was named in 1825 by French missionary and naturalist Joseph Callery, who collected a specimen from a tree growing in a garden in Shanghai. The species name calleryana is derived from his surname.

Cultivation

In the 20th century, Pyrus calleryana was imported into the United States for use as a rootstock in pear orchards. It has since become popular as an ornamental tree for its spring blossom, autumn color, and resistance to disease. However, it is also considered an invasive species in many parts of North America, where it has escaped from cultivation and colonized natural habitats.

Uses

The wood of Pyrus calleryana is dense and hard, making it suitable for use in furniture and tool handles. The fruit is small and hard, not generally used for eating, but can be used to make a fermented drink.

Environmental Impact

Despite its ornamental value, Pyrus calleryana has been recognized as an invasive species in several U.S. states. It is capable of outcompeting native plants and altering habitats. Efforts are being made to control its spread and to educate the public about its environmental impact.

See also

• List of invasive species in the United States
• Pear
• Invasive species

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