226 IOWA ACADEMY OV SCIENCES 



USTlLAGINiE OF IOWA. 



BY H. H. HUME. 



tV/%0, Persooii Syn. Fung. 224. ]SOl. 



Mycelium located in the tissues of the host, annual or 

 perennial, spores produced from the mycelium at definite 

 points on lines, stems or flowers, gelatinous at first, later 

 pulverulent, in one species a hard, dark mass, smooth, 

 echinulate or reticulated. 



Spore masses in the inflorescence hard, irregular, vari- 

 able in size, spores minutely spiny. U. Austro-americana. 



Spore masses iii the ovaries of Arena satica, glumes 

 destroyed, spores minutely spiny. U. a venae. 



Spore masses blackish, in the ovaries of Bromos hrevi- 

 (trisiatus, spores tuberculate with blunt projections. 



U. bromivora. 



Spore masses in the ovaries of Setaria Italica, glumes 

 not affected; spores subglobose or irregular, contents gran- 

 ulated. U. Crameri. 



Spore masses in the inflorescence of Ilonleiim viilgare, 

 glumes not totally destroyed, spores smooth. U. Hordei. 



Spore masses in unexpauded inflorescence of Stipa 

 tipartea, spores small, 3-5u, smooth. U. hypodytes. 



Spore masses in the ovaries of Arena sativa, glumes not 

 destroyed, spores smooth. U. levis. 



Spore masses between the nerves on the leaves, amphig- 

 enous spores smooth. U. longissima. 



Spore masses in the inflorescence of Honleum culgare, 

 glumes early destroyed, spores echinulate. 



U. nuda. 



Spore masses light brown, spores golden brown, echinu- 

 late, when mature escaping through the upturned walls of 

 the capsule. U. oxalidis. 



