The following bibliography has been generated by bringing together all references provided by our content partners. There may be duplication.

References

• Anonymous. 1986. List-Based Rec., Soil Conserv. Serv., U.S.D.A. Database of the U.S.D.A., Beltsville.
• Balick, M. J., M. Nee & D. E. Atha. 2000. Checklist of the vascular plants of Belize. Mem. New York Bot. Gard. 85: i–ix, 1–246.
• Breedlove, D. E. 1986. Flora de Chiapas. Listados Floríst. México 4: i–v, 1–246.
• Brewster, J.L. 2008. Crop production science in horticulture, Volume 15: Onions and other vegetable Alliums. Wallingford, Oxon, Great Britain: CABI Publishing. 2nd ed.
• CONABIO. 2009. Catálogo taxonómico de especies de México. 1. In Ca. nat. México. CONABIO, Mexico City.
• Cope, R.B. 2011. Toxicology brief: Allium species poisoning in cats and dogs. Retrieved 7 October 2011 from http://veterinarymedicine.dvm360.com/vetmed/article/articleDetail.jsp?id=174478&sk=&date=&%0A%09%09%09&pageID=2.
• Dodson, C. H., A. H. Gentry & F. M. Valverde Badillo. 1985. Fl. Jauneche 1–512. Banco Central del Ecuador, Quito.
• FAOSTAT 2011. Searchable online database from Food and Agriculture Division of the United Nations. Retrieved 7 October 2011 from http://faostat.fao.org/site/567/DesktopDefault.aspx?PageID=567#ancor.
• Flora of China @ eFloras.org
• Flora of China Editorial Committee. 2000. Fl. China 24: 1–431. Science Press & Missouri Botanical Garden Press, Beijing & St. Louis.
• Flora of North America @ eFloras.org
• Flora of North America Editorial Committee, e. 2002. Magnoliophyta: Liliidae: Liliales and Orchidales. 26: i–xxvi, 1–723. In Fl. N. Amer. Oxford University Press, New York.
• Flora of Pakistan @ eFloras.org
• Fritsch, R.M., and N. Friesen. 2002. "Chapter 1: Evolution, Domestication, and Taxonomy." In H.D. Rabinowitch and L. Currah, eds. Allium Crop Science: Recent Advances. Wallingford, UK: CABI Publishing. pp. 5–30. ISBN 0-85199-510-1.
• Gleason, H. A. & A. Cronquist. 1968. The Pteridophytoa, Gymnospermae and Monocotyledoneae. 1: 1–482. In H. A. Gleason Ill. Fl. N. U.S. (ed. 3). New York Botanical Garden, New York.
• Grayum, M. H. 2003. Alliaceae. In: Manual de Plantas de Costa Rica, B.E. Hammel, M.H. Grayum, C. Herrera & N. Zamora (eds.). Monogr. Syst. Bot. Missouri Bot. Gard. 92: 43–45.
• Griffiths, G., L. Trueman, T. Crowther, B. Thomas and B. Smith. 2002. Onions—A global benefit to health. Phytotherapy Research 16: 603–615.
• Jørgensen, P. M. & S. León-Yánez. (eds.) 1999. Catalogue of the vascular plants of Ecuador. Monogr. Syst. Bot. Missouri Bot. Gard. 75: i–viii, 1–1181.
• Lawesson, J. E., H. Adsersen & P. Bentley. 1987. An updated and annotated check list of the vascular plants of the Galapagos Islands. Rep. Bot. Inst. Univ. Aarhus 16: 1–74.
• Marticorena C & R Rodríguez . 1995-2005. Flora de Chile. Vols 1, 2(1-3). Ed. Universidad de Concepción, Concepción. 351 pp., 99 pp., 93 pp., 128 pp. Matthei O. 1995. Manual de las malezas que crecen en Chile. Alfabeta Impresores. 545 p.
• Merck 2011. Poisonous range plants of North America. Merck Veterinary Manual. Retrieved 7 October 2011 from http://www.merckvetmanual.com/mvm/htm/bc/ttox04.htm.
• Molina Rosito, A. 1975. Enumeración de las plantas de Honduras. Ceiba 19(1): 1–118.
• Nasir, E. & S. I. Ali (eds). 1980-2005. Fl. Pakistan Univ. of Karachi, Karachi.
• Radford, A. E., H. E. Ahles & C. R. Bell. 1968. Man. Vasc. Fl. Carolinas i–lxi, 1–1183. University of North Carolina Press, Chapel Hill.
• Renner, S. S., H. Balslev & L. B. Holm-Nielsen. 1990. Flowering plants of Amazonian Ecuador---A checklist. AAU Rep. 24: 1–241.
• Standley, P. C. & J. A. Steyermark. 1952. Liliaceae. In Flora of Guatemala - Part III. Fieldiana, Bot. 24(3): 59–100.
• Stevens, W. D., C. U. U., A. Pool & O. M. Montiel. 2001. Flora de Nicaragua. Monogr. Syst. Bot. Missouri Bot. Gard. 85: i–xlii, 1–2666.
• USDA PLANTS 2011. “Allium cepa.” In U.S. Department of Agriculture, Natural Resources Conservation Service, PLANTS Database. Retrieved 7 October 2011 from http://plants.usda.gov/java/profile?symbol= ALCE.
• Voss, E. G. 1972. Gymnosperms and Monocots. i–xv, 1–488. In Michigan Fl. Cranbrook Institute of Science, Bloomfield Hills, Michigan.
• Wikipedia 2011. “Onion.” Wikipedia, The Free Encyclopedia. 6 May 2011, 23:15 UTC. 22 May 2011. http://eol.org/pages/1084354/details#wikipedia.