54 HETEROSTYLED DIMORPHIC PLANTS. CHAP. I. 



ments made by Vaucher I was led to think that Solda- 

 nella alpina was heterostyled, but it is impossible that 

 Kerner, who has closely studied this plant, could have 

 overlooked the fact. So again from other statements it 

 appeared probable that Pyrola might be heterostyled, 

 but H. Miiller examined for me two species in North 

 Germany, and found this not to be the case. 



