

< 



I 



1917J ARTHUR— RUSTS OF RUBUS 5°3 



name 



name 101 

 . become 



(H 



form 



as Aecidium nitens, in a paper on the fungi of North Carolina, the 

 host being reported as Rubus strigosus, but a recent study of the 

 type collection shows it to be in all probability R. Enslenii Tratt. 

 This region is far south of the known range of the long cycle form, 



may 



form in hand. The specific name 



combined 



with a distinctive generic name. 



Many short cycle genera have now been established. Those 

 which come nearest to the desired characters for the Rubus rust 

 are the aecidioid genus Endo phyllum , and the uredinoid genus 

 Botryorhiza. What is now needed is a caeomoid genus, for which no 



exists. If any one feels reluctance in placing the telia of a 



name 



form in a different genus from 



form from which they cannot be distinguished morphologically, let 

 him reflect that he does not hesitate to call the common salt- 

 grass rust Uromyces Peckianus Farl., when it has numerous meso- 

 spores, and Puccinia subnitens Diet., when the mesospores are 

 few, a closer relationship than in the blackberry rusts. Other such 

 accepted anomalies, in the application of the genera Uromyces and 

 Puccinia, could be cited. After all, we are not near enough to a 

 I nomenclature of the rusts along well considered genetic lines to 



from 



^^ 



ambiguous 



meet these requirements short cycle forms 



from 



rust 



blackberries and raspberries, I take the opportunity to recogniz. 

 the distinguished service which Dr. Louis Otto Kunkel has 

 rendered to uredinology, not alone by the discovery of the true 

 nature of this rust through the use of free surface germination of the 



» Schweinitz, L. D., Schrift. Nat. Gesell. Leipzig i :6 9 . 1822. 





