580 



THE AMERICAN NATURALIST 



[Vol. L 



ratio is 3 tall to 1 dwarf. Obviously the present data 

 are of little use in the study of this question because in 

 the first place it consists of a mixture of F 2 , F 3 and F 4 

 plants and in the second place the vine characters of the 

 parents in the different crosses are unknown. It is quite 

 possible that the parents in the case of pedigree No. 1318 

 were both of the bush type. The 22 plants in the F 2 gen- 

 eration in this strain are all of the bush type. 



The only reason for presenting the data in Table III 

 at this time is to call attention to the relation between the 

 bush type of vine and the Old-Fa shioned Yellow Eye 

 pattern. There seems to be no question but that these 

 two characters are closely associated. 



Literature Cited 



Emerson, R. A. 1904. Heredity in Bean Hybrids. Ann. Kept. Nebr. Agr. 



Expt. Stat. 1904. pp. 33-68. 

 1916. A Genetic Study of Plant Height in Phaseolus vulgaris. Nebr. 



Agr. Expt. Stat. Research Bull. No. 7, pp. 1-72. 

 Pearl, R, and Surface, F. M. 1915. Studies on Bean Breeding. I. Stand- 

 ard Types of Yellow Eye Beans. Ann. Kept. Me. Agr. Expt. 



Stat. 1915, pp. 161-176. 

 von Tschermak, E. 1904. Weitere Kreuzungsstudien an Erbsen Levkoje* 



und Bohnen. Zeit. landw. Versuchsw. Osterreich, pp. 1-102. 

 1912. Bastardierungsversuche an Levkojen, Erbsen und Bohnen mit 



Riicksicht auf die Ealtorenlehre. Zeit. indulc. Abst. Vererl., 



Bd. 7, pp. 81-234. 



