c. V. L. CHARLIER, TRIENTALIS EUROP^A. 9 



Thickness of the stem 

 Samples with 



Sum 160 76 



The numerical calculations of the mean and the disper- 

 sion gave: 



Samples with 1 stalk 



M = O^^'jTes ± 0,015 



(7 = ,183 ± 0,010 

 •.' (7 : i¥ = 0,23 8. 



Samples with 2 stalks 



M = 0'^'^,90- ± 0,020 

 0- = ,176 ± 0,014 



'.• g:M = 0,194. 



Taking into account the mean errors in the means we 

 find that there is a pronounced correlation between the 

 thickness of the stem and the number of flower-stalks, the 

 samples with 1 stalk having a thickness (of the stem) of 

 0°^°',7 7, those with 2 stalks having a thickness of 0°^°^,9i. I 

 leave it undiscussed, if this result shall be declared in such 

 a manner that the greater thickness favours the generation 

 of more than one flower-stalk, or that we have two different 

 types of Trientalis eiiropcea one with 1 flower and thinner 

 stem, another with 2 (or more) flowers and a thicker stem. 



