Hemicolcospo7'uim. 251 



Uredo tussilaginis, Pers. Grev., " Flor. Edin.," p. 438. 

 Johnst., "Flor. Berw.," vol. ii. p. 198. 



Uredo petasites. Grev., " Flor. Edin.," p. 441. Johnst., 

 "Flor. Berw.," vol. ii. p. 198. 



Coleospofium sonchi-arvensts, Lev. Cooke, " Hdbk.," p. 521 ; 

 "Micro. Fungi," 4th edit., p. 21 8, t. viii. figs. 178, 179. 



Coleosporium cacalice, D. C. Cooke, " Micro. Fungi," 4th 

 edit., p. 218. 



Coleospormm tussilaginis, Lev. Cooke, "Hdbk.," p. 520; 

 ''Micro. Fungi," 4th edit., p. 217, t. viii. figs. 180, 181. 



Coleosporium petasiiis, Lev. Cooke, "Hdbk.," p. 521; 

 "Micro. Fungi," 4th edit., p. 217. 



Exsiccati. 

 Cooke, i. 32, 80, 81; ii. 44, 15:, 152; " L. R," 45. Vize, 

 "Fungi Brit.," 45, 48; "Micro. Fungi Brit," 49. 



On Sonchus arvensis, oleraceus, Tussilago farfara, Petasites 

 offici7ialis, Cacalia hastata. 

 May to October. 



Biology. — I have followed Winter and Schriiter in uniting these 

 species, but further biological observations will probably show some 

 of them to be distinct. 



Coleosporium campanulse. (Pers.) 



Uredospores — Sori yellow, small, rounded, soon pulverulent and 

 scattered. Spores in short chains, rounded or elongated, 

 verrucose, orange-yellow, 17-25 x 13-20/x,. 



Teleutospores — Sori at first orange, then red, at length brownish, 

 flat, confluent. Spores cylindrical or clavate, generally four- 

 celled, 90-100 X l8-2 2;u. 



Synonyms. 



Winter, loc. at., p. 246. Schrot, loc. cit., p. 369. 



Uredo campanulce. Pers., "Syn.," p. 217. Grev., "Flor. 

 Edin.," p. 440. Johnst., "Flor. Berw.," vol. ii. p. 200. 



Coleosporium campanulce, Lev. Cooke, "Hdbk.," p. 521 j 

 " Micro. Fungi," 4th edit, p. 218. 



Uredo Crustacea. Berk., " Eng. Flor.," vol. v. p. 378. 



