orton: north American species of allodus 205 



surrounded in the sori by a well-developed dark brown stroma; 

 teliospores terete, sometimes truncate above 15-19 by 45-5bM, 

 wall about I /x thick, cinnamon-brown, smooth, the apex 7-1 1> M 

 thick; pedicel tinted, short. 



On Compositae: 



Helicopsis helianthoides (L.) Sweet and H. scabra Dunal. 

 Type locality: Long Pine, Nebraska, on Helicopsis scabra. 

 Distribution: Nebraska, Iowa, Minnesota and Delaware. 

 Exsiccati: Ell. & Ev. Fungi Columb. 1463; Griff. W. Am. Fungi 

 322; Barth. Fungi Columb. 4141; Barth. N. Am. Ured. 125, 929. 



44. Allodus tenuis (Schw.) Arth. Result. Sci. Congr. Bot. 



Vienne 345. 1906 

 Caeoma (Aecidium) tenue Schw. Trans. Am. Phil. Soc. II. 4: 293. 



1832. 

 Puccinia tenuis Burr. Bot. Gaz. 9: 188. 1884. 

 Dicaeoma tenue Kuntze, Rev. Gen. 3^: 470. 1898. 



Aecia hypophyllous, in annular groups on discolored areas or 

 scattered in small groups over the leaf; aeciospores 11-14 by 

 12-17 u; wall about I M thick, finely verrucose. 



Telia chiefly hypophyllous, intermixed with the secondary 

 scattered aecia, long covered by the epidermis surrounded in the 

 sori by a well-developed brown stroma; teliospores fusoid to 

 cylindrical, 11-14 by 26-34 Ml wall cinnamon-brown, about i m 

 thick, smooth, the apex 5-7 M thick; pedicel concolorous, short. 



On Compositae: 



Eupatorium urticaefoUum Reich. {E. ageratoides L. ;.) 

 Type locality: Bethlehem, Pennsylvania, on Eupatorium ager- 



atoides. , 



Distribution: Vermont to West Virginia, Minnesota, and Iowa. 

 Exsiccati: Ell. N. Am. Fungi 1420, 1838; Ell. «& Ev. N. Am. 



Fungi 1810; Rab.-Paz. Fungi Eur. 4141; Barth. N. Am. Ured. 65. 



45. Allodus gnaphaliata (Schw.) Arth. Result. Sci. Congr. Bot. 



Vienne 345. 1906 

 Aecidium gnaphaliatum Schw. Trans. Am. Phil. Soc. II. 4: 292. 



Puccinia investita Schw. Trans. Am. Phil. Soc. II. 4: 296. 1832. 

 Dicaeoma investitum Kuntze, Rev. Gen. 3^: 469. 1898. 



Aecia hypophyllous, opposite conspicuous yellow areas on the 

 leaf, gregarious; aeciospores 17-23 by 20-29 /x; wall 1.5-2 m tnicK, 

 rather conspicuously verrucose. 



