It grows pyramidal to columnar in youth, but … Family: Rosaceae. They are sexually reproducing populations consisting of multiple genotypes that recombine every generation. long; shiny dark green and leathery, small round-toothed margins; scarlet, mahogany, purple hues in fall. ization on invasive potential is Pyrus calleryana Decne., com-monly called the Callery pear, a popular ornamental tree, which has as many as 29 commercially available cultivars. Foliage The leaves are alternate, simple, 2-3 in. Callery Pear, Pyrus calleryana Callery pear (Pyrus calleryana) is a species of pear tree native to China that was brought to the US in the early 1900’s in an unsuccessful attempt to improve fi reblight resistance in edible pears. "Autumn Blaze" has a consistent reddish, purple color, for which it is often selected. Editors: Steven Bell, Margaret Brown, Brigitte Coulton, Kimberly Marsho, Marsha Mercer,  & Christa Watters across; fruits mature in fall and are small, hard, brown, and almost woody. Originally brought to the United States from Asia to combat disease affecting the common pear, this non-native tree, including the popular ‘Bradford’ cultivar, is now planted in high density in a variety of urban and suburban settings. (5.1-7.6 cm) long, petiolate, and shiny with wavy, slightly toothed margins. Leaves: deciduous, alternate, simple, broad-ovate to ovate, 1½-3 in. It is propagated asexually (by grafting and cuttings) and does not change over time. The leaves are oval, 4 to 7 cm (1.6 to 2.8 in) … The various cultivars of this species are more commonly available than the species itself. Click on each photo to see large images and detailed information. Often known as “Bradford” or “Cleveland Select” ornamental pear, this foreign invader is one of the greatest scourges of the NNIS (non-native invasive species) world. Pyrus calleryana Photo by Gary A. Monroe. A single tree can spread rapidly by seed and vegetative means forming a sizeable patch within several years. Ecological Threat. It can spread aggressively outside cultivation. It's a 13.5-acre former farm field along I-75 just north of the exit for SR 129. Subscribe to our website! Return to the Table of Contents | Download a PDF of Plant Invaders of Mid-Atlantic Natural Areas, APWG HOME PAGE | PCA Pyrus calleryana ‘Bradford’ is one genotype. 'Chanticleer' is one of the best ornamental pears for … Last updated:11-Nov-2010, http://www.nps.gov/plants/alien/pubs/midatlantic/. Graphics: Marilyn Thomson Pyrus calleryana demonstrates the importance of the horticultural pathway in the invasion process. Spreads: by seeds that are dispersed to new locations by starlings and other birds that eat the fruits. contributors include: Committee Members: Leslie Cameron, Tyler Ormsby, Marilyn Thomson, & Rachel Vecchio The Bradford pear and related cultivars of Pyrus calleryana are regarded as invasive species in many areas of eastern and mid-western North America, outcompeting many native plants and trees. Pyrus calleryana (Callery Pear) is listed in the Invasive Plant Atlas of the United States. Although most plant species introduced for horti… Cooperative Extension, which staffs local offices in all 100 counties and with the Eastern Band of Cherokee Indians. The leaves are alternate, simple, 2 to 3 in. FLOWERING ORNAMENTAL PEAR, CALLERY PEAR. Last year, I vowed not to take any more pictures of blooming Callery pear (Pyrus calleryana). Tree Characteristics While some genotypes are self-incompatible, meaning they require cross pollination from another genotype in order to set seed, others can pollinate themselves. Flower Callery Pear trees are shallow-rooted and will tolerate most soil types including clay and alkaline, are pest-and pollution-resistant, and tolerate soil compaction, drought and wet soil well. Pyrus calleryana, commonly called Callery pear, is native to China and Taiwan. Around 1950, the ornamental value and hardiness of Callery pear were recognized, leading to the development of a number of cultivars, including ‘Bradford.’ Cultivars in the U.S. originated from China and represent different genotypes. Culley et al. The simplest method of controlling the spread of callery pear is to avoid planting it. Ecological Threat Thus, the Bradford pear cultivar is one of several cultivars (varieties) of Callery pear capable of spreading and being invasive. Callery pear has invasive traits that enable it to spread aggressively. Introduced, Invasive, and Noxious Plants : Threatened & Endangered: Wetland ... or see all the Pyrus thumbnails at the Plants Gallery Steve Hurst. According to the U.S Forest Service, Invasive species have contributed to the decline of 42% of U.S. endangered and threatened species, and for 18% of U.S. endangered or threatened species. 2020 Invasive Plant Factsheet: Callery Pear (Pyrus calleryana) This non-native tree, including the popular 'Bradford' cultivar, is now planted in high density in a variety of urban and suburban settings. They have been widely planted throughout the United States since the early 1900s as an ornamental. (5.1-7.6 cm) long, petiolate and shiny with wavy, slightly-toothed margins. Consumer demand for unique and novel plant species facilitates the introduction of nonnative species, which are then mass-produced, transported, and distributed locally to gardeners and landscapers. New cultivars of Pyrus calleryana were bred to reduce the tree's tendency to split in snow or high winds. Fish and Wildlife Services consider it a plant invader of Mid-Atlantic natural areas. . It grows pyramidal to columnar in youth, but … Flower Although still available in commerce, it should be phased out of production, the eventual goal to completely eliminate the species and cultivars. Summary 5 Pyrus calleryana, the Callery pear, is a species of pear native to China and Vietnam, in the family Rosaceae.It is a deciduous tree growing to 15 to 20 m (49 to 66 ft) tall, often with a conic to rounded crown. It grows best in full sun but will tolerate some shading and drought. Wild forms develop traits … HOME PAGE Its success as an invader results from its capacity to produce copious amounts of seed that is dispersed by birds and possibly small mammals, seedlings that germinate and grow rapidly in disturbed areas and a general lack of natural controls like insects and diseases, with the exception of fire blight. (2001): Ultimately, this study indicates that increased spread of P. calleryana has been initiated by introduction of multiple cultivar types and subsequent widespread planting and is not the result of an inherent fi tness advantage of hybrid progeny" The Bradford cultivar was widely planted as a promising new ornamental during the 1950s. It is native to China and Vietnam. August 3, 2005 version 1 Assessment of Invasive Species in Indiana’s Natural Areas ***OFFICIAL Callery Pear (Pyrus calleryana) ASSESSMENT*** Answers are underlined and in bold, comments are inserted in italics Drafted 8-10-2012 by Ellen Jacquart, Reviewed 8-13-2012 by David Gorden, Brenda Howard, Pyrus calleryana NC State University and N.C. A&T State University work in tandem, along with federal, state and local governments, to form a strategic partnership called N.C. Once established Callery pear forms dense thickets that push out other plants including native species that can’t tolerate the deep shade or compete with pear for water, soil and space. Callery pear trees (Pyrus calleryana) fro… http://www.nps.gov/plants/alien/pubs/midatlantic/pyca.htm I never thought I could be so definitive about an invasive plant, but Callery pear is a biological disaster. Flowers, fruits and seeds: flowers in early spring before the leaves, white with five petals, about 1 in. It is an upright-branched ornamental tree. Different genotypes growing near each other (e.g., within about 300 ft.) can cross-pollinate and produce fruit with viable seed. Are Callery Pear (Pyrus calleryana) Cultivars Invasive? The University of Georgia - Center for Invasive Species and Ecosystem Health. and questions about the website should be directed to the webmaster. Prescribed fire is a common management technique in prairie ecosystems to mimic natural disturbances. Medium to large trees should be cut down and stumps treated with a systemic glyphosate or triclopyr-based herbicide (see Control Options). Services consider it a plant invader of Mid-Atlantic natural areas are not cultivars global commerce and the availability plants... Habitat Callery pear or any cultivars including the well known Bradford pear cultivar one! That enable it to spread aggressively and southern regions of the field covered! 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