336 



Didichium artmdinacemn (L.) Britt., Selbyville, Oct. 4, 1907, 

 (1803, Barth. Fungi Columb. 2662) ; Seaford, Nov. 14, 1907, 

 (1761). 



In 1901 Arthur (Jour. Myc. 8:54. 1902) first began culture work 

 showing that aecia which occur commonly on Aster, Solidago and related 

 hosts are genetically connected with uredinia and telia on various species 

 of Carex. The culture work conducted by Arthur is extensive and 

 extends over a period of years from 1901-1914. In this series of culture 

 work aecia have been produced on various species of Aster, Solidago, 

 Erigeron, Leptilon and Euthamia, using telia from many species of 

 Carex fi'om various parts of North America and from Dulichium. (Jour. 

 Myc. 8:54. 1902; 11:58. 1905; 12:15. 1906; 14:13. 1908; Bot. Gaz. 

 35:15, 21. 1903; Mycol. 1:233. 1909; 2:224. 1910; 4:15, 16. 1912; 

 7:70,81. 1915). Eraser in 1911 (Mycol 4:181. 1912) confirms Arthur's 

 results in part by successfully infecting A^iier (tcu)ninati(s using telial 

 material from Care.v trisperind. 



This study has also shown that the species as here considered is a 

 composite form made up of several distinct physiological races. 



The species is separable from all other American species of Puccinia 

 on Carex by the presence of two pores in the upper part of the rather 

 small (12-19 by 16-23(a) uredospores, and the medium sized (12-20 by 

 35-50;j.) teliospores. 



44, Puccinia Batesiana Arth. Bull. Torrey Club 28:661. 1901. 



On Carduaceae: 



Heliopsiyt helianthoides (L.) B. S. P., Newark, Oct. 4, 1905, 

 (1510). 

 This species has not been recorded otherwise on this host but has 

 been collected in Iowa, Minnesota and Nebraska on //e/zo/jsis scubra, 

 Dunal. 



45. Puccinia Vernoniae Schw. Proc. Am. Phil. Soc II. 4:296. 1832. 

 Puccinia bulluta Schw. Schrift. Nat. Ges. Leipzig 1:74. 1822. 



On Carduaceae: 



Vemonia noveboracensis (L.) Willd., Clayton, July 24, 1907, 

 (1707). 

 This very common species is apparently confined to the United 

 States and is the only one so far i-ecorded north of Mexico. The name 



