Origin: in Ames, Iowa, by H.L. Lantz, Iowa State College. Introd. in 1958. (Waneta × Moorpark) × Japex; seed planted in 1932; selected for testing about 1935-40; tested under the number Ames 200; the female seedling parent was produced by Harlow Rockhill of Conrad, Iowa; the pollen parent, a seedling of Prunus salicina, was selected by Luther Burbank. Tree: Fruit: round, uniform in size and form, about 1 to 1 1/2 inches in diam.; stem short; skin dark blue; flesh amber, tender, juicy, makes excellent sauce; clings tone; hangs well on tree; quite resistant to brown rot. Named after Professor H.L. Lantz.