ON HIERACIUM-HYBRIDS OBTAINED BY 

 ARTIFICIAL FERTILISATION 



BY G. MENDEL. 



(Communicated to the Meeting 9 June, 1869*.) 



ALTHOUGH I have already undertaken many experiments 

 in fertilisation between species of Hiemcium, I have only 

 succeeded in obtaining the following 6 hybrids, and only 

 from one to three specimens of them. 



H. Auricula <j? x H. aurantiacum $ 



H. Auricula ? x H. Pilosella $ 



H. Auricula $ x H. pratense $ 



H. echioides^ ^xff. aurantiacum $ 



H. prwaltum $ x H. flagellare Rchb. $ 



H. proecdtum $ x H. aurantiacum $ 



The difficulty of obtaining a larger number of hybrids 

 is due to the minuteness of the flowers and their peculiar 

 structure. On account of this circumstance it was seldom 

 possible to remove the anthers from the flowers chosen for 



* [Published in Verh. naturf. Ver. Briinn, Abhandlungen, vin. 1869, 

 p. 26, which appeared in 1870. ] 



t The plant used in this experiment is not exactly the typical 

 H. echioides. It appears to belong to the series transitional to 

 H. preealtum, but approaches more nearly to H. echioides and for 

 this reason was reckoned as belonging to the latter. 



