Classification, 173 



Ustilago grandis, Fr. 



Appearing as long streaks on tlie culms beneatli 

 the leaf-sheaths, soon becoming black and powdery ; 

 resting-spores globose^ angular, or elongated, pale 

 brown, smooth, 6-8 or 8-14 x 6-9 /x; promycelium 

 cylindrical, narrow at the point of attachment to the 

 spore 2 — septate, sporidia terminal and lateral, sub- 

 fusiform. 



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

 Sacc. Syll. vii. ii. n. 1642 ; Cke. Micr. Fung. t. vi. 

 figs. 128, 129; Plow. Brit. Ured. and Ustilag. p. 

 275. 



On Phragmites communis, Tijpha latifolia, 'T, 

 minor. Not uncommon. 



Ustilago grammica, B. and Br. (figs. 96, 97). 



Forming equidistant, encircling black bands from 

 2 — 3 mm. long on the culms, resting-spores globose 

 or subangular, pale brown, smooth, 2*5-3 /j, dia- 

 meter. 



Ustilago grammica, B. and Br. Ann. Nat. Hist. n. 

 483; Cke. Micr. Fung. t. vi. figs. 120, 121; Plow. 

 Brit. Ured. and Ustilag. p. 275; Sacc. Syll. vii. ii. n. 

 1638. 



(Type in Herb. Berk., Kew.) 



On culms of Glyceria fluitans, G. aquatica. Air a 

 ccespitosa. Remarkable in its habit of growing in 

 bands round the culm, the bands are composed of 

 distinct parallel streaks. Rare. 



Ustilago marina, Durieu. 

 Forming irregular, wart-like excrescences on the 



