278 



KAUL H. KRISTOFFKRSON 



found to ])c conirary to the l)ehavioiir ot the corolla in some ol the 

 crosses. 



Table 17 shows the variation of the length of the odd calyx-leaf 

 in the cross 3 X 10. The means of the odd calyx-leaf is about the 

 same in the both parent-lines and Fi. The variation in F^ is trans- 

 gressive. Whether a segregation had taken place or not is not yet 

 settled; the calyx-leaves being much more modifiable than the petals. 



TABLE 16. The length of some vegetative organs in the parent-lines 



and in Fi. 



TABLE 17. The length of the odd calyx-leaf in the parent-lines 



and the bastards. 



Another character investigated was the length of the stalk. I 

 had two lines of different height of the stalk in culture, viz. N:o 2 

 and 13. In other characters they were identical. The average of 

 the stalk of line 2 was 26,6 cm., of line 13 ll,ß. Fi was 15,3 cm.; thus, 

 it was about intermediate. F. showed a continuous segregation. Most 

 plants were intermediate and only a few reached the height of the 

 parents. Unfortunately a large number of the plants were destroyed 

 and therefore I made no calculations of the variation. Probably the 

 segregation was due to several factors. 



