Bui. 179, U. S. Dept of Agriculture. 



Plate XIII. 



Stones of Hybrid Varieties of Prunus. 



Fig. 1.— Prunus orthosepala. Figs. 2 to 15.— Hybrids: 2, Cultivated tree, Highland Park, Rochester, 

 N. Y. (originally from ElUs, Kans.); 3, 4, arid 5, Laire variety; 6, Surprise; 7 and 8, Hammer; 9, 

 Ames; 10, Prunus maritima hybrid; 11 and 12, Marianna; 13, Six Weeks; 14, Maryland; 15, 

 Compass. (Natural size.) 



