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FicuRE I. Until recently the capsules and seeds of sweet potatoes have 

 rarely been known. The cultivated varieties are propagated vegetatively 

 as clonal varieties and are decidedly self-fruitless. By making cross-i)olli- 

 nations between plants of certain different varieties seeds may be had. The 

 seedlings grown from such seed are decidedly self -incompatible. 



The capsules shown above were produced at The New York Botanical 

 Garden by cross-pollination between certain plants which were themselves 

 self-fruitless. 



