Origin: in Rock Island, Wash., by Harry Yount. Introd. in 1932. Plant patent 74; 26 Sept. 1933; Harry Yount, Douglas County, Wash., and Andrew T. Gossman, Wenatchee, Wash.; assigned to Gossman. Parentage unknown; seed planted in 1923 by Yount. Tree: young trees have vigorous growth and upright form. Fruit: large; flat, oval; skin light yellowish with a bright, deep red blush over one-half or more; flesh flavor rich, plum-like, somewhat acid, texture slightly coarse, firm, melting; said to keep well; freestone; ripens early; resembles Yakimene. Name coined from the words Rock Island.