AMERICAN UREDINE^E. 191 



Ges. zu Leipzig, Jahrg. 1895-6 :198. Infects Leucojum 

 vernum. 



7. Puccinia orchidearum-phalaridis Klebahn. 1898. 

 Zeits. f. Pflkr. 8:23, 9:155. Infects Orchis maculala, 

 Platanthera chlorantha, and Listcra ovata. 



Puccinia scssilis was the first of these species published, 

 and the description, based upon teleutospores collected in 

 Silesia, would apply to all. Dr. Winter in Saxony made 

 the first cultures (Ber. d. Nat. Ges. zu Leipzig, 1874 :41), 

 and showed that the teleutospores of a Puccinia not dis- 

 tinguishable from Puccinia scssilis, produced its secidium 

 on Allium , and the experiments were repeated by Plow- 

 right in England with the same result (1887. Jour. Linn. 

 Soc. 24:89). Magnus claimed (1894. Hedw. 33:83) that 

 as the secidium on Allium and Arum did not occur in 

 Silesia where the teleutosporic type material was collected, 

 while an secidium was common there on all the four hosts 

 named above under "3" , therefore the name Puccinia scssilis 

 must apply to the Puccinia producing these latter aecidia. 

 This would require a new name for the Puccinia infecting 

 Allium, which he accordingly called Puccinia winteriana . 



The culture experiments in Europe have been numerous 

 and carried on for several years, and the results seem, in 

 general, well established. Klebahn tried growing Puccinia 

 smilaccarum-digraphidis for a number of seasons on Poly- 

 gonaium ,to see whether it would develop a tendency to 

 less easily infect the other hosts. He found that it did in- 

 fect Polygonatum more strongly than other hosts, and in 

 his last article he says that although it is wise to guard 

 against too hasty conclusions, he thinks that his experi- 

 ments appear to indicate the possibility of a change in the 

 character of a fungus through cultures. 



This species has been called Puccinia striatula Peck 

 (Puc. linearis Pk.), a name of uncertain application, but 

 which is probably not to be cited as a synonym. 



