186 SYSTEMATIC POMOLOGY 



brids between Prunus triflora on one side, and, on 

 the other, Prunus hortulana or Prunus angustifolia. 

 Characterized by very vigorous, upright, or spreading 

 growth; long, willowly branches, which are usually 

 red or reddish; leaves broad obovate, shining, finely 

 serrate; fruit red or yellow, intermediate in texture 

 between the Japanese and the Wildgoose plums. 

 Represented by Gonzales, Golden, Nona, Yates, etc. 



VI. OMAHA GROUP (Prunus triflora rusticd). Very 

 vigorous-growing upright tree, with large, stiff, rather 

 straight branches; leaves large, a little coarse, irregu- 

 larly serrate; fruit large, usually cordate or conic; 

 flesh yellow, firm. Hybrids between Prunus triflora 

 and Prunus americana. Omaha typifies the group, 

 but there are no other conformable varieties in gen- 

 eral propagation. 



VII. WICKSON GROUP (Prunus triflora recta). Tree 

 upright, with slender, willowy, greenish branches; 

 leaves rather small, stiff, green, ovate, somewhat con- 

 duplicate; fruit usually red, large; flesh yellow, firm; 

 flavor peculiar, somewhat resembling the Simon 

 plum. Hybrids between Prunus triflora and Prunus 

 simonii. Wickson is typical. President and Bartlett 

 are other varieties. 



VIII. SIMON PLUM (Prunus simonii}. Tree dis- 

 tinctly upright, branches slender and willowy; leaves 

 oblong, lanceolate, conduplicate, closely serrate; 

 flowers borne singly or in pairs; fruit oblate, dull, 

 red, with a very short stem; flesh firm, poor quality; 

 stone roundish, rough, somewhat spongy. Native to 

 China. Cultivated for market. There is as yet only 

 one pure variety, the Simon plum. 



