No. 585] 



INHERITANCE OF HABIT 



555 



explanation of habit characters assumed, such a plant 

 would have the formula aLT. Without a support which 

 happened to have been placed near it, the peculiarity of 

 the plant would not have been so noticeable. 



A cross of Mohawk and Golden Carmine, a pole bean, 

 gave in the F 2 generation 7 plants of the bush type and 

 28 plants more or less pole like. In the notes no separa- 

 tion of pole and runner beans were made, probably due 

 to a lack of clear distinction between the two as occurs 

 in many crosses. 



Cross Type 10. ALt X AIT 

 White Marrow by Burpee Stringless is presumably a 

 cross of this type. In one case the F is described as a 

 pole and in another as a runner bean. The F 2 genera- 

 tion results in 38 bush to 108 described as runner beans. 

 This is consistent with expected results when the plant 

 is described as a whole. The expectations are 12 pole 

 and more or less pole like beans and four more or less 

 bush like forms. 



Cross Type 12 or 13. ALt + aLT or aLt 

 A cross of White Marrow, a runner variety, with Pro- 

 lific Black Wax, which belongs to the type with spreading 

 outstretched branches, gave 20 bush plants and 58 plants 

 of the runner and pole types, no differentiation being 

 made between the two. This is consistent with the as- 

 sumed constitutions. 



Cross Type 14 or 15. ALt X alt or alT 

 White Marrow with Currie behaves according to ex- 

 pectation, giving in the F a generation 41 bush plants e or 

 / in type, and 52 of the runner or semi-runner type. 



In the cross of Blue Pod by White Marrow and its recip- 

 rocal, neither variety being pole in type, climbing plants 

 apparently occur as well representative of most if not all 

 of the other habit types. Some lots isolated were very 

 erect, others spreading in various degrees ; one lot is de- 



