16 ARKIV FÖR BOTANIK. BAND 12. NIO 14. 



Breadth of 'petals 



ilf = 3,27 ± 0,25 

 Ö- = 0,3 8 ± 0,1 1 



Hence we have 



6:Z = 0,43. 



11. Sepals. Even here only a few measurements (11 and 

 6 respectively) were made of the length (I) and the breadth (6). 



These numbers give: 



Breadth of the sepals 



M = 0,60 ± 0,05 

 (7 = 0,1 2 ± 0,04 



G : M = 0,20. 



For these characters as well as for the petals the disper- 

 sions were calculated from the average dispersions, as is always 

 to be recommended when the number of measures is small. 



