282 B7'itish UredinecE and Usiilao-jnea: 



Synonyms. 



Schrot, loc. cit., p. 274. Winter, loc. at, p. loi. 

 Uredo tragopogi. Pers., " Disp. Meth.," p. 57. 

 Ustilago receptaculoruin, Fries. Cooke, " Hdbk.," p. 515; 

 " Micro. Fungi," 4th edit., p. 230, t. v. figs. 92-95. 



Exsiccati. 

 Cooke, i. 59 ; ii. 434. Vize, "Micro. Fungi," 134. 



On Tragopogon pratensis. 

 May to July. 



Biology.— See p. 80. 



Ustilago cardui. F. v. Waldh. 



Spore-masses brown, produced in the florets. Teleutospores 

 globose or shortly elliptical, violet, with very high reticulating 

 ridges, 15-20 x 10-15/A. 



Synonym. 



Ustilago cardiii, Waldh. Bull. Sc. Nat. de Moscou, 1867, 

 vol. i. Cooke, " Micro. Fungi," 4th edit., p. 231. Schrot., loc. 

 cit., p. 274. Winter, loc. clt., p. loi,. 



On Card mis acanfhoides. 

 July and August. 



Biology.— See p. 7?,. 



SPHACELOTHECA. De Bary. 



Teleutospores contained in a compact receptacle, formed of 

 barren cells provided with a columella, and open above. Teleu- 

 tospores simple. Germination as in Ustilago. 



Sphacelotheca hydropiperis. (Schum.) 



Spore-masses black, elongated, projecting from the perianth, 

 formed in the ovary, at length opening at the top and allow- 

 ing the dusty teleutospores to escape. Teleutospores globose 

 or elongated, dark violet, transparent, smooth, 9-12 x 8-1 i/x. 



