We have information from several sources:
Simon, J.E., A.F. Chadwick and L.E. Craker. 1984. Herbs: An Indexed Bibliography. 19711980.
Advances in New AlliumsMichael J. Havey
MagnessJ.R., G.M. Markle, C.C. Compton. 1971. Food and feed crops of the United States.
Onions and its Relativesproduction links
Outside Links
Allium spp.FAO/IPGRI Technical Guidelines for the Safe Movement of Germplasm No. 18Link to the publication on the International Plant Genetic Resources Institute web site