280 



KARL B. KRISTOFFERSOX 



with regard to the position of the main axis. I was not able to make 

 a complete classifying of the growth form of the branches, as this called 

 for a long time of investigation. On account of the fact that the main 

 axis and the branches were not investigated at the same time an ana- 

 lysis of a possible coupling between the factors for the position of 

 the main axis and the branches could not be made. 



TABLE 18. The growth forms in F^. 



It is not easy to state anything w ith regard to the factorial diffe- 

 rences between the parent lines. On account of the variation in Fo, 

 however, I do not think that the differences are very great. 



A few crossings both belonging to the type A were also made, viz. 

 2 X 10 and 2 X 13. Fx resembled the parents and did not show any 

 segregation in Fo. The same was the case with crossings with V. 

 Miinbyaim. Thus the erect forms seemed to have the same factor 

 complex. 



CROSSINGS WITH V. MUNBYANA. 



V. Munbyana Boiss. & Reut, is a large flowering Melanium violet; 

 contrary to V. tricolor and V. arvensis it is a perennial and winters by 

 new shoots developed at the end of summer or in the beginning of 

 autumn. During the first year the growth form is the same as in 

 lines 10 and 2 (type A); then it becomes prostrate. It is much more 

 robust during the first year than these forms. The petals are much 

 larger than in V. tricolor and crenated in the margin. Their colour 

 is violet with an ash-grey tinge. If the anthocyan is extracted and the 

 solution warmed up it does not become colour-less as is the case 

 with a solution of the anthocyan of V. tricolor. It is considerably 

 discoloured, it is true, but a blue-gray or ash-grey tinge is still seen. 

 The pollen-magazine is closed and the labellum w^ell developed. 



I have crossed V. Munbyana with a line of V. tricolor (line 10), 

 as well as with lines of V. arvensis (lines 5 and 25). As the hybrids 

 between these species and V. Munbyana are nowhere described, so far 



