386 Me7iders Experiments with Hieraciiim 



Whether from this circumstance we may venture to draw 

 the conclusion that the polymorphism of the genera Salix 

 and Hieraciujn is connected with the special condition of ^k 

 their hybrids is still an open question, which may well be ^ 

 raised but not as yet answered. i 



[The discovery of Ostenfeld and Raunkiaer that Hiera- 

 cittm is frequently parthenogenetic, or apogamous, of course 

 puts an entirely new construction on the results of these 

 experiments. See p. 247.] 



