Callery pear (Bradford pear)
Pyrus calleryana Decne.


Overview

Appearance
Bradford pear is a cultivar of Pyrus calleryana. It is a deciduous tree that can grow up to 60 ft. (18 m) in height and 2 ft. (0.6 m) in diameter.
Foliage
The leaves are alternate, simple, 2-3 in. (5.1-7.6 cm) long, petiolate, and shiny with wavy, slightly toothed margins.
Flower
Flowering occurs early in the spring (April to May) before the leaves emerge. The flowers are 1 in. (2.5 cm) wide, showy, malodorous, and white. It is insect pollinated.
Fruit
Fruits are round, 0.5 in. (1.3 cm) in diameter and green to brown in color.
Ecological Threat
Pyrus calleryana 'Bradford', produce sterile fruits because they do not self-pollinate. They have been widely planted throughout the United States since the early 1900s as an ornamental. New cultivars of Pyrus calleryana were bred to reduce the tree's tendency to split in snow or high winds. The Bradford pear cultivar, other P. calleryana cultivars and P. betulifolia or Asian pear, can hybridize and produce fertile fruit. In addition to this, fertile pear varieties are commonly used as the rootstock when grafting. If the grafted crown is damaged the fertile rootstock can them dominate, producing fertile fruit. These factors and others may have contributed to the trees seeding out into natural areas and becoming an invasive problem.
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Resources


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Maps



EDDMapS Distribution

EDDMapS Distribution - This map is incomplete and is based only on current site and county level reports made by experts, herbaria, and literature. For more information, visit www.eddmaps.org

State Regulated List

State Regulated List - This map identifies those states that list this species on their regulated list. For more information, visit Invasive.org

Taxonomic Rank


Kingdom: Plantae
Phylum: Magnoliophyta
Class: Magnoliopsida
Subclass: Rosidae
Order: Rosales
Family: Rosaceae
Genus: Pyrus
Subject: Pyrus calleryana Decne.

Categories


Plants - Hardwood Trees