Callery pear (Bradford pear) USDA PLANTS Symbol: PYCA80
U.S. Nativity: Exotic
Habit: Hardwood Trees
Pyrus calleryana Decne.

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Taxonomic Rank: Magnoliopsida: Rosales: Rosaceae
Native Range: China (REHD); China, Vietnam (GRIN);

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.

Identification, Biology, Control and Management Resources

Selected Images from Invasive.orgView All Images at Invasive.org


Tree(s); Trees in flower
Britt Slattery, US Fish and Wildlife Service, Bugwood.org
Additional Resolutions & Image Usage

Flower(s);
James H. Miller, USDA Forest Service, Bugwood.org
Additional Resolutions & Image Usage

Fruit(s);
James H. Miller, USDA Forest Service, Bugwood.org
Additional Resolutions & Image Usage

Tree(s); in flower
James H. Miller, USDA Forest Service, Bugwood.org
Additional Resolutions & Image Usage

Tree(s); in flower
James H. Miller, USDA Forest Service, Bugwood.org
Additional Resolutions & Image Usage

Tree(s); in flower
James H. Miller, USDA Forest Service, Bugwood.org
Additional Resolutions & Image Usage

Tree(s); Tree in flower
Dan Tenaglia, Missouriplants.com, Bugwood.org
Additional Resolutions & Image Usage

Foliage;
Chuck Bargeron, University of Georgia, Bugwood.org
Additional Resolutions & Image Usage

Bark;
Chuck Bargeron, University of Georgia, Bugwood.org
Additional Resolutions & Image Usage

Fruit(s);
Chuck Bargeron, University of Georgia, Bugwood.org
Additional Resolutions & Image Usage

Seed(s);
Steve Hurst, USDA NRCS PLANTS Database, Bugwood.org
Additional Resolutions & Image Usage

Infestation;
David J. Moorhead, University of Georgia, Bugwood.org
Additional Resolutions & Image Usage

Flower(s); flower petals on ground
David J. Moorhead, University of Georgia, Bugwood.org
Additional Resolutions & Image Usage

Feature(s); tree splitting
David J. Moorhead, University of Georgia, Bugwood.org
Additional Resolutions & Image Usage

Seedling(s);
David J. Moorhead, University of Georgia, Bugwood.org
Additional Resolutions & Image Usage

Tree(s);
David J. Moorhead, University of Georgia, Bugwood.org
Additional Resolutions & Image Usage

Tree(s);
David J. Moorhead, University of Georgia, Bugwood.org
Additional Resolutions & Image Usage

EDDMapS Distribution:
This map is incomplete and is based only on current site and county level reports made by experts and records obtained from USDA Plants Database. For more information, visit www.eddmaps.org
 


State(s) Where Reported invasive.
Based on state level agency and organization lists of invasive plants from WeedUS database.

U.S. National Parks where reported invasive:
Stones River National Battlefield (Tennessee)



Invasive Listing Sources:
Alabama Invasive Plant Council
Commonwealth of Pennsylvania, Department of Conservation and Natural Resources, 1994.
Eric Ulaszek, U.S. Forest Service, Midewin National Tallgrass Prairie, Illinois
Georgia Exotic Pest Plant Council
Maryland Cooperative Extension Service.  2003. Invasive Plant Control in Maryland. Home and Garden Information Center, Home and Garden Mimeo HG88. 4 pp.
Mid-Atlantic Exotic Pest Plant Council, 2005
Native Plant Society of Oregon, 2008
South Carolina Exotic Pest Plant Council
Tennessee Exotic Pest Plant Council
Virginia Invasive Plant Species List