578 THE AMERICAN NATURALIST [Vol.L 



been made between these two varieties. Something over 

 40 cross-pollinated beans have been secured. Of these, 

 15 have been grown at least as far as the F, generation. 



These 15 plants gave a total of 

 295 Fj beans. Except for some 

 minor fluctuations these F^ beans 

 were all alike, but differed mark- 

 edly from either parent. In the 

 notes these F\ beans have been 

 designated "Piebald" because of 

 the very irregular spotted pat- 

 tern. Fig 3 shows a typical pie- 

 bald pattern. In addition to the 

 spotting these beans differ from 

 the Improved Yellow Eye in hav- 

 ing a very irregular outline to the 

 colored area. While the pattern 

 is somewhat variable, there is 

 never any difficulty in distin- 

 guishing this from the typical Im- 

 proved Yellow Eye pattern. 



Up to the present time only 

 a few of these hybrids have been 

 carried to the F 2 generation. However, enough have 

 been obtained to show that these piebald beans give both 

 parent types and also more beans with the piebald 

 pattern. It is very probable that only these three types 

 occur in the F 2 and later generations. 



While the data so far obtained from hand-pollinated 

 hybrids are not sufficiently extensive to warrant further 

 discussion, certain other data have been obtained which 

 have a bearing on this subject. 



In 1911 and 1912 the Experiment Station grew a num- 

 ber of plots planted with different strains and varieties of 

 beans. Among these were a number of strains of Im- 

 proved and Old Fashioned Yellow Eye. In some cases 

 plots of these two varieties were located near each other. 

 Seed from some of the 1911 plots were planted in' 1912. 



