UstilaginecB. 275 



Ustilago grandis. Fries. 

 On the caulms beneath the leaf-sheath, often occupying whole 

 intemodes, black, dusty. Teleutospores globose, elongated 

 or irregular, pale brown, smooth, 7-12 x 6-8/^. 



Synonyms. 



Ustilago grandis. Fries, " Syst. Mycol.," vol. iii. p. 518. 

 Schr5t., " Krypt. Flor. Schl.," vol. iii. p. 268. Winter, loc. cit, 87. 



Ustilago typhoides. B. and Br., A7in. Nat. Hist., No. 480. 

 Cooke, "Hdbk.," p. 513 ; "Micro. Fungi," 4th edit., p. 229, t. vi. 

 figs, 128, 129. 



On Phragmites communis. 

 July to November. 



Biology.— See p. 83. 



Ustilago grammica. B. and Br. 



Forming little transverse bands, consisting of short, parallel black 

 lines, 2 mm. or more long. Teleutospores globose, very minute. 



Synonym. 

 Ustilago grammica. B. and Br., Anfi. Nat. Hist., No. 483. 

 Cooke, "Hdbk.," p. 514; " Micro. Fungi," 4th edit., p. 229, t. vi. 

 figs. 120, 121. 



On Aira ccespitosa and Glyceria aquatica. 

 I have never met with this species ; and am unable to give 

 any details concerning its spore-germination. 



Ustilago marina. Durieu. 

 Spore-masses blackish brown, forming sweUings on the roots. 

 Teleutospores of two forms : {a) globose or obtusely ovoid or 

 elongated, 10-13//,; {b) irregularly ovoid elongate, 16 x 

 10-13/X, olive-brown, smooth. 



Synonym. 

 F. V. Waldh., " Syst. des Ust.," p. 17. 

 Ustilago marina. Cooke, " Grevillea," vol. xiv. p. 90. 



On Scirpus parvuhcs. 



