246 GRASSES OF lO^A. 



Clinton, [Iowa. A second fungus has been described by Tracy 

 and Earle on this grass, namely, r. erus-galU. This fungus 

 affects the panicles and upper nodes. The mass of spores is 

 covered by a more or less persistent membrane. The pustules 

 in some cases are quite large, an inch or more long. The 

 round spores are minutely roughened and measures 8-12" in 

 diameter. Magnus* described a smut on barnyard grass, the 

 Cintractia seymouriana, and in a later number of the same 

 journal changes the name of the fungus to G. crus-galli (Tracy 

 and Earle) t, Magnus. The spores and general character of 

 the fungus makes it closely allied to the Burrill lungus, but 

 the spores examined by the writer are globose or nearly so, 

 and somewhat smaller. The U. bullata, Berk., produces pustu- 

 late swellings in the individual spikelets of a species of Triti- 

 cum. These vary somewhat in size, but it is evidently closely 

 allied to U. sphaegroena. The VstUago bullata is allied 1o the U. 

 pustu lata, Tracy and Earle, J which occurs on Panicum proli- 

 ferum. It infests the ovaries, forming rounded bullate swellings. 

 Spores dark brown, oval to sub-globose, slightly echinulate, 

 found at Ames. U. Panici miliacei (Pers.) Wint. is widely distri- 

 buted in Europe on Panicum miliaceum and P. crus-galli. It 

 produces large distorted swellings in the inflorescence very 

 much like P. syntlierisma'. The fungus on Panicum capillare is 

 sometimes referred to U. panici miliacei. 



Manna grass smut ( Ustilago longissima), Sow. , Tul. , § is common 

 on species of Glyceria, producing elongated gray pustules in 

 the leaves. These pustules contain the globular, smooth spares 

 which measure 3-6 x 3-4.5" in diameter. The latter germinate 

 readily in a damp atmosphere or in water. The writer obtained 

 abundant germination by keeping the spores in a vasculumorin 

 a closed vessel for twenty-four hours. The short promycelium 

 is narrow and straight. It produces from its end a one-celled 

 conidium. The writer has found this species on Glyceria arun- 

 dinacea. 



•Ber. d. deut. Bot. Gesellsch. 14: 216. 

 +1. c. Heft. 9. 



Syll. Fung. 7: 468. Berkley and Hooker. Antarct. Voy. 199. pi. 106. f. 12. 

 tBuU. Torrey. Bot. Olub. 22: 175. 



Tubeuf. Ptianzenkrankhelten. 301. Winter Die Pilze. 1 : 89. Saccardo Syll. Fung. 

 54. 



Uredo longissima. Sow. in Berk. Engl. Fl. 5: 375. t. 139. 

 §Tulasne. Mem. Sur. les Ustil. Ann. d. 8cl. Nat. Bot. III. 7: 76. 



Saccardo. Syll. Fung. 7: 451. 



Plowright. Mon. Brit. Ured. and Ust. 272. 



