232 Trans. Acad. Sci. of St. Louis. 



gonum Pennsylvanicum, Riley and Republic counties. The 

 spores are surrounded by a gelatinous envelope which binds 

 them together when it hardens. 



The germination in water begins after a day or two and 

 proceeds slowly. The promycelia are small and slender, 

 frequently branched, and irregular in shape. Conidia few. 



4. U. Avenae (Pers.) Jensen, Le Charbon des Cereales, p. 



4. (!) 



Common on oats. 



The germination of this species and the other loose smuts 

 of the small grains ( U. laevis, £7". Hordei, U. 7iuda, and U. 

 Tritici) has been quite fully studied and described by Kel- 

 Lerman and Swingle in the Second Annual Report of the 

 Kansas Experiment Station. 



5. U. laevis (K. & S.) P. Magnus, Ust. Provinz Branden- 



burg, p. 69. (!) 

 On oats, not so common as the above. 



6. U. Hordei (Pers.)K. & S., Second Ann. Rept. Kans. 



Exp. Station. 

 On barley, Manhattan. 



7. U. nuda (Jensen) K. & S., Second Ann. Rept. Kans. 



Exp. Station. 

 On barley, Coolidge. 



8. U. Tritici (Pers.) Jensen, Second Ann. Rept. Kans. 



Exp. Station. 

 Common on wheat all over the State. 



9. U. Aristidae Peck, Bull. Torr. Bot. Club, XII. p. 35. 



(!) (Plate XXV. 19-23.) 



On Arislida (purpurea?), Hodgeman and Ellis counties. 

 The smut fills the ovaries, and the awns are much shorter 

 than usual and so changed that the species could not be 

 recognized. 



Germination begins almost immediately in water. After 

 four hours a promycelium 10-12 /j. long was produced. This 



