1/2 British Fttngi. 



in lengthy on living leaves of Glyceria fluitans, G. 

 aquatica, and PJialaris arundi?iacGa. Common. 



Ustilago hypodytes, Fr. 



Produced on the culms, concealed at first by the 

 leaf -sheaths, resting-spores blackish, with an olive 

 tinge in the mass, soon pulverulent, globose, or 

 irregularly angular or elongated, pale brown, smooth, 

 3-6 fjb diameter, sometimes a few are present much 

 larger than usual. 



Ustilago hypodytes, Fr. Syst. Myc. iii. p. 518 ; 

 Cke. Micr. Fung. t. v. figs. 100, 101 ; Plow. Brit. 

 Ured. and Ustilag. p. 273 ; Sacc. Syll. vii. pt. ii. n. 

 1641. 



Originating as long streaks on the culms below the 

 leaf-sheaths which soon become swollen by the mass 

 of spores. On Triticum repens, T. junceum^ Avena 

 flavescens, Elymus arenarius, Bromus erectuSj Phrag- 

 nnites communis ^ Psamma arenaria. Not uncommon. 



Ustilago segetum, Ditm. 



Developing in the inflorescence which is soon 

 covered with a powdery, olive-black mass ; resting- 

 spores globose or irregularly angular, pale brown, 

 smooth or obscurely granular, 5-10 /jl diameter. 



Ustilago segetum, Ditm. in Sturm's Deutschl. Fl. ; 

 Sacc. Syll. vii. ii. n. 1676; Plow. Brit. Ured. and 

 Ustilag. p. 273; Cke. Micr. Fung. pi. v. figs. 98, 

 99. 



On Festuca piratensis^ Avena flavescens^ A. elatior^ 

 A. sativa, Triticum vulgare, Aira csesjpitosay Sordeuin 

 vulgare, H. murinum, H. distichum, Lolium jjcrenne. 

 Not uncommon. 



