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



17 



12. Stamens. The length of the filament (/) and of the 

 anther (a) was measured for 22 samples (the anther only 

 for 18). I give beneath the values obtained as well as those 

 for the total length, I, of the stamen, where I = f -{• a. 



The measures are here ordered according to the length 

 of the filament. 



From these numbers is obtained: 



Filament. 



M = 2,79 ± 0,12 

 o = 0,50 ± 0,08 



o: M = 0,17. 



Anther. 



i¥= 1,73 ± 0,20 

 o = 0,20 ± 0,14 



(7 :iW = 0,12. 



Arkiv för botanik. Band 12. X:o 14. 



