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Taxon: Pyrus ×calleryana Decne.

Genus: Pyrus
Section: Pashia
Family: Rosaceae
Subfamily: Amygdaloideae
Tribe: Maleae
Subtribe: Malinae
Nomen number: 30463
Place of publication: Jard. fruit. 1:329, sub t. 8. 1872, pro sp.
Link to protologue: http://dx.doi.org/10.3931/e-rara-47581
  • • a hybrid of Pyrus pashia × P. betulifolia
  • • valid publication verified from original literature
  • • for final year of publication see TL II 1:609, entry 1338. 1976
Name Verified on: 24-Nov-2018 by ARS Systematic Botanists.
Accessions: 177 (110 active, 13 available) in National Plant Germplasm System (Map)

Autonyms (not in current use), synonyms and invalid designations:

(≡ homotypic synonym, = heterotypic synonym, - autonym, I invalid designation)

Common names:

  • Bradford pear  (Source: AH 505) - English
  • callery pear  (Source: Cornucopia) - English
  • mame-nashi  (Source: F Japan) - Japanese Rōmaji
  • litet kinapäron  (Source: Kulturvaxtdatabas) - Swedish
  • dou li  (Source: F ChinaEng) - Transcribed Chinese

Economic Importance:

  • Environmental: ornamental
  • Materials:
  • Weed:

Distributional Range:


    • CHINA: China [Anhui Sheng, Zhejiang Sheng, Fujian Sheng, Henan Sheng, Hunan Sheng, Hubei Sheng, Jiangxi Sheng, Jiangsu Sheng, Guangdong Sheng, Shandong Sheng, Shaanxi Sheng (s.), Guangxi Zhuangzu Zizhiqu]
    • EASTERN ASIA: Korea, Taiwan

    • INDO-CHINA: Vietnam (n.)

    Cultivated (also cult.)


    Northern America
    • NORTHEASTERN U.S.A.: United States [Indiana, Michigan, New Jersey, Ohio, Pennsylvania, West Virginia]
    • NORTH-CENTRAL U.S.A.: United States [Illinois, Kansas, Missouri, Oklahoma]
    • SOUTHEASTERN U.S.A.: United States [Alabama, Arkansas, Florida, Georgia, Kentucky, Louisiana, Maryland, Mississippi, North Carolina, South Carolina, Tennessee]
    • SOUTH-CENTRAL U.S.A.: United States [Texas]
    • SOUTHWESTERN U.S.A.: United States [California]


  1. Aldén, B., S. Ryman, & M. Hjertson. 2012. Svensk Kulturväxtdatabas, SKUD (Swedish Cultivated and Utility Plants Database; online resource) Note: not as hybrid
  2. Aubréville, A. et al., eds. 1960-. Flore du Cambodge du Laos et du Viet-Nam. Note: not as hybrid
  3. Barbosa, W. et al. 2007. Asian pear tree breeding for subtropical areas of Brazil. Fruits 62:21-26. Note: not as hybrid
  4. Bell, R. L. & A. Itai. 2011. Chapter 8. Pyrus. Wild crop relatives: genomic and breeding resources, temperate fruits 147-177. Note: not as hybrid
  5. Challice, J. S. & M. N. Westwood. 1973. Numerical taxonomic studies of the genus Pyrus using both chemical and botanical characters. Bot. J. Linn. Soc. 67:123. Note: not as hybrid
  6. Chinese Academy of Sciences. 1959-. Flora reipublicae popularis sinicae. Note: not as hybrid
  7. Culley, T. M. & N. A. Hardiman. 2007. The beginning of a new invasive plant: a history of the ornamental callery pear in the United States. BioScience 57:956-964. Note: not as hybrid
  8. Culley, T. M. & N. A. Hardiman. 2009. The role of intraspecific hybridization in the evolution of invasiveness: a case study of the ornamental pear tree Pyrus calleryana. Biol. Invas. 11:1107-1119. Note: not as hybrid
  9. Encke, F. et al. 1984. Zander: Handwörterbuch der Pflanzennamen, 13. Auflage Note: not as hybrid
  10. Facciola, S. 1990. Cornucopia, a source book of edible plants Kampong Publications. Note: not as hybrid
  11. FNA Editorial Committee. 1993-. Flora of North America. Note: not as hybrid
  12. Hanelt, P., ed. 2001. Mansfeld's encyclopedia of agricultural and horticultural crops. Volumes 1-6 Note: not as hybrid
  13. Huxley, A., ed. 1992. The new Royal Horticultural Society dictionary of gardening Note: not as hybrid
  14. Itai, A. 2007. Chapter 6. Pear. Genome mapping and molecular breeding in plants (7 vols.) Springer, Berlin, Heidelberg. 4:157-170. Note: not as hybrid
  15. Iwatsuki, K. et al. 1993-. Flora of Japan. Note: not as hybrid
  16. Jiang, S. et al. 2016. Primitive genepools of Asian pears and their complex hybrid origins inferred from fluorescent sequence-specific amplification polymorphism (SSAP) markers based on LTR retrotransposons. PLoS One 11(2): e0149192. Note: supports a hybrid origin
  17. Lee, Y. N. 1997. Flora of Korea. Note: not as hybrid
  18. Liberty Hyde Bailey Hortorium. 1976. Hortus third. Note: not as hybrid
  19. Ohwi, J. 1965. Flora of Japan (Engl. ed.). Note: not as hybrid
  20. Porcher, M. H. et al. Searchable World Wide Web Multilingual Multiscript Plant Name Database (MMPND) (on-line resource). Note: not as hybrid
  21. Seemüller, E. et al. 2009. Pear decline resistance in progenies of Pyrus taxa used as rootstocks. Eur. J. Pl. Pathol. 123:217-223. Note: this study included five accessions, one recognized as the species, two recognized as vars. tomentella and "gracilifolia", and two representing cv. 'Bradford'
  22. Silva, G. J. da et al. 2018. Pear (Pyrus spp.) breeding. Adv. Plant Breed. Strateg. Vol. 3 4:131-163.
  23. Tamura, F. 2012. Recent advances in research on Japanese pear rootstocks. J. Jap. Soc. Hort. Sci. 81:1-10.
  24. Teng, Y. 2011. The pear industry in China. Chron. Hort. 51:23-27. Note: not as hybrid
  25. Teng, Y.-W. et al. 2002. Genetic relationships of Pyrus species and cultivars native to East Asia revealed by randomly amplified polymorphic DNA markers. J. Amer. Soc. Hort. Sci. 127:262-270. Note: not as hybrid
  26. Terrell, E. E. et al. 1986. Agricultural Handbook no. 505 Note: not as hybrid
  27. Townsend, C. C. & E. Guest. 1966-. Flora of Iraq. Note: not as hybrid
  28. Tuz, A. S. 1972. K voprosu klassifikatsii roda Pyrus L. (Up-to-date systematics of the genus Pyrus L.). Trudy Prikl. Bot. 46:77. Note: not as hybrid
  29. Verheij, E. W. M. & R. E. Coronel, eds. 1991. Edible fruits and nuts. Plant Resources of South-East Asia (PROSEA) 2:274. Note: not as hybrid
  30. Vincent, M. A. 2005. On the spread and current distribution of Pyrus calleryana in the United States. Castanea 70:20-31. Note: not as hybrid
  31. Walters, S. M. et al., eds. 1986-2000. European garden flora. Note: not as hybrid
  32. Westwood, M. N. & H. O. Bjornstad. 1971. Some fruit characteristics of interspecific hybrids and extent of self-sterility in Pyrus. Bull. Torrey Bot. Club 98:22-24. Note: not as hybrid
  33. Wu Zheng-yi & P. H. Raven et al., eds. 1994-. Flora of China (English edition). Note: not as hybrid
  34. Yamamoto, T. & E. Chevreau. 2009. Pear genomics. Genetics and genomics of Rosaceae 8:163-186. Note: not as hybrid
  35. Zheng, X. et al. 2014. Phylogeny and evolutionary histories of Pyrus L. revealed by phylogenetic trees and netwoks based on data from multiple DNA sequences. Molec. Phylogenet. Evol. 80:54-65. Note: this study found the phylogentic position of this species unresolved
  36. 2018. Mid-Atlantic invasive plant species (on-line resource) Note: not as hybrid

Check other web resources for Pyrus ×calleryana Decne. :

  • Flora of North America: Collaborative Floristic Effort of North American Botanists
  • PLANTS: USDA-NRCS Database of Plants of the United States and its Territories
  • BONAP North American Plant Atlas of the Biota of North America Program:
  • Flora of China: Online version from Harvard University
  • TROPICOS: Nomenclatural and Specimen Database of the Missouri Botanical Garden
  • Mansfeld: Mansfeld's World Databas of Agricultural and Horticultural Crops
  • ePIC: Electronic Plant Information Centre of Royal Botanic Gardens, Kew
  • AGRICOLA: Article Citation Database or NAL Catalog of USDA's National Agricultural Library
  • Entrez: NCBI's search engine for PubMed citations, GenBank sequences, etc.
  • PubAg: USDA's National Agricultural Library database of full-text journal articles and citations on the agricultural sciences.


  • Seed: U.S. National Seed Herbarium image

Cite as: USDA, Agricultural Research Service, National Plant Germplasm System. 2020. Germplasm Resources Information Network (GRIN-Taxonomy).
National Germplasm Resources Laboratory, Beltsville, Maryland. URL: https://npgsweb.ars-grin.gov/gringlobal/taxonomydetail.aspx?id=30463. Accessed 14 August 2020.