1923] 



Bau: Morphological Characters in Crepis Capillaris 



225 



TABLE 3 



Showing the Eesults of Crossing for Inheritance of Number of Lobes 



Applying Castle's formula the number of factors would be 



(11.3-8.9)2 5.76 



8(3.362 _ 1 372) 75 2 



an obvious impossibility. 



Fig. 2.— Typical leaves from different plants of the F^ generation, c. X %. 



The data can be interpreted on a four factor hypothesis where 

 each factor in a homozygous condition contributes two lobes and, in a 



heterozygous condition, one lobe, 

 formula would be, 



On this hypothesis the genotypic 



and the data on this hypothesis would give a curve which simulates 

 the normal curve of error with the mode at 8. 



