234 Trans. Acad. Sci. of St. Louis. 



I have already described the general appearance and effect 

 on the latter host in a note in the Botanical Gazette, Oct. 

 1895. 



Germination in water after 24 hours. The promycelium 

 is medium sized, arrows little and bears few conidia. 



In nutrient solutions germination takes place after two or 

 three days. The promycelium is almost as wide at the base 

 as the spore, and bears large yeast-like colonies of conidia. 

 The conidia are short and oval. Germination by Brefeld* 

 and Kiihn. 



The spores are aggregated in masses and this species seems 

 much like a Sorosporium, but until further studies of the 

 development I have left it here. 



14. U. neglecta Niessl, Kab. Fungi Europ., no. 1200. 



(Plate XXVIII. 7, 8.) 



On Setaria, glauca, Manhattan. The smut does not affect 

 the outward appearance of the host plant except to slightly 

 enlarge the ovaries. 



Germination usually unsuccessful. In one culture on glass 

 plate in nutrient solution some spores at the edge of a large 

 drop had germinated as shown in fig. 8. They could not be 

 seen with the high power objective without displacing them 

 but the liquid near was full of detached conidia ( ?) (fig. 7). 

 These may, however, have been from some yeast in the cul- 

 ture. None of the spores farther from the edge showed 

 germination. 



15. U. Mays Zeae (DC.) Magnus, Ust. Prov. Brand., p. 72. 



(Plate XXV. 6-13.) 



Common on all parts of Zea Mays, everywhere. 



Germination begins in water in 18-24 hours. The promy- 

 celium is 3 or 4 celled and often bears numerous conidia, 

 usually 2-4. The conidia are fusiform and easily detached. 

 The whole promycelium is often detached a short distance 

 from the spore in a few hours after production. Air conidia 

 are abundant in dryer cultures. Fresh spores germinate very 



* Untersuchungen, V. p. 94. 



