1920] BISBY—UROMYCES 209 



This rust was known only from South America before its dis- 



Holway 



South American 



Herb 



no. 2136. Arthur suggests that U. marginatus Bomm. and Rous 



maj 



Rhap 



ms. While 



been impossible to examine specimens of these two collections. 



8. Uromyces Solidaginis (Sommerf.) Niessl, Verh. Natur. 

 Ver. Brunn 10:163. 1872. — Caeoma Solidaginis Sommerf. Suppl. 

 Fl. Lapp. 234. 1826; Caeomurus Solidaginia Kuntze, Rev. Gen. 

 3 3 :45°- 1898; Telospora Solidaginia Arth., Result. Sci. Congr. 

 Bot. Vienne 346. 1906. 



O. Pycnia not found; probably wanting. 



III. Telia hypophyllous, sometimes also petiolicolous or cau- 

 licolous, crowded and often confluent in orbicular groups upon the 

 leaves, or in elongated groups upon the petioles or stems, 2-10 mm. 

 across, upon yellowish spots, roundish, small, 0.3-0.7 mm. across, 

 early naked, compact, pulvinate, chocolate-brown, surrounding 

 epidermis noticeable; teliospores obovate or ellipsoid, 17-25 X 

 2 4~33 M, narrowed or rounded at the ends; wall chestnut-brown, 



12 /x, smooth; pedicel 



much 



nearly colorless, about as long as the spore. 



On Carduaceae: Solidago polyphylla Rydb., Colorado; S. serotina Ait., 



Montana, Washington, Wyoming. 



Type locality: Nordland, Sweden, on Solidago virgaurea. 



Distribution: Colorado to Montana and Washington, also in Europe and 

 Asia. 



Illustrations: Archiv. Natunv. Land. Bohmen 13: Jig. 12; Beitr. Krypt. 

 Schweiz2 2 : Jig. 44. 



Exsiccati: D. Griff., W.Am. Fungi 361 ; Ellis and Ev., N.Am. Fungi 2883. 



Literature: Cooke, Grev. 5:152. 1877; Winter, in Rab. Krypt. 

 Fl. i x :i4i. 1881; Saccardo, Syll. Fung. 7:566. 1888; Fischer, Beitr. Krypt. 

 Schweiz 2^59, 543. 1904; Fischer, Ber. Schw. Bot. Gesells. 15: (1-2). 1905; 

 Hariot, Les Ured. 216. 1908; Sydow, Monog. Ured. 2:10. 1909. 



This is the one species of Uromyces included in this paper which 

 is not endemic to the Americas. Fischer (1905) reported cultures 

 of this rust. He also (1898) pointed out the correlation between 

 this species and U. J unci (Desmaz.) Tulasne, which bears aecia 



