UstilaginecB. 281 



Stellaria graminea, holostca, Lychnis flos-cuculi^ vespertina, and 

 diiifyia. 



June to October. 



Biology.— See p. 78. 



Ustilago major. Schrot. 



Spore-masses blackish violet, produced in the anthers, pulverulent. 

 Teleutospores spherical or elongated, violet, reticulated with 

 ridges about i/a high and i/u. distant from each other, 

 7-13 X 7-9/^- 



Symonyjji. 



Ustilago major. Schrot. in Cohn's '* Krypt. Flor. Schl.," 

 vol. iii. p. 273. 



On Silene otiies. Near Brandon ; Mr. Frank Norgate. 

 July and August. 



Biology.— See p. 84. 



Ustilago kiihneana. Wolff. 



Produced on the stems, flowers, and on the leaves in the form 



of spots or striae, rusty violet. Teleutospores globose, violet, 



rather transparent, reticulated with very slightly elevated ridges, 



which form a close network on the epispore, io-18/x in 



diameter. 



Synonym. 



Winter, loc. cit., p. 98. 



Ustilago kiihneana. Wolff in j5^/. Zd'//., 1874, p. 814. Cooke, 



"Micro. Fungi," 4th edit., p. 231. 



On Runiex acetosa and acetosella. 

 June and July. 



Biology.— See p. 80. 



Ustilugo tragopogi. (Pers.) 



Spore-masses blackish violet, destroying the whole of the flowers, 

 enclosed in the involucre. Teleutospores globose, generally 

 irregularly rounded, opaque, dark violet, with very fine reticu- 

 lations, 13-17 X 10-13/X. 



