It appears that there are two mutations, indistinguishable from each other as concerns both fruit and tree characteristics except that the fruit cracks sometimes in one and apparently less frequently in the other. The northern California type: orig. in the Mount Pleasant district near Penryn, Calif., by Jack Bergtholdt. Introd. in 1931. Bud mutation of Santa Rosa; discovered in 1915; name of Late Rosa was given this variety by Harry Butler and F.E. Kayo. Origin: Tree: Fruit: matures about 1 month after Santa Rosa; apparently does not crack or split as much as the northern California type; flesh firmer than other type, remains yellow to maturity, with little or no red next to skin.
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