386 Menders Experiments with Hieracium 



Whether from this circumstance we may venture to draw 

 the conclusion that the polymorphism of the genera Salix 

 and Hieracium is connected with the special condition of 

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

 raised but not as yet answered. 



[The discovery of Ostenfeld and Raunkiaer that Hiera- 

 cium is frequently parthenogenetic, or apogamous, of course 

 puts an entirely new construction on the results of these 

 experiments. See p. 247.] 



