42 



USTILAGO HYPHODYTES, (Schlect) Fr. Grass smut. Destroys the 

 tissues of the stem within the sheaths. Found but once on 

 porcupine grass, (Stipa spartea.) 



USTILAGO MAYDIS, (DC.) Corda. Corn smut. On ears, stalks, 

 and tassels of corn. Often totally destroying the ear. It lias 

 not been plentiful enough to cause much damage. 



USTILAGO NUDA, (Jensen) Kellerm <fc Swingle. Naked smut of 

 barley. Often causing the complete destruction of barley 

 heads. Several fields were observed to be quite badly afflict- 

 ed by this smut- 



USTILAGO TRITICI, (Pers.) Jensen. Loose smut of wheat. Sim- 

 ilar in appearance and effects to the proceeding species. Com- 

 mon and destructive. Some fields were badly damaged the 

 past season. 



SPHAEKOPSIDEAE. 



VERMICULARIA DENUDATA, Schw. ( ?). On leaves and stems of 

 Kentucky blue grass (Poa pratensis) and wire grass (Poa 

 compressa)- Usually not very destructive as it is most plenti- 

 ful rather late in the season. In a few instances it did con- 

 siderable damage to Kentucky blue grass. 



STEGONOSPORA SPINACEAE, E. & E. (n. sp. in lit.). Leaf spot of 

 spinach. This species was discovered on leaves of spinach in 

 the college gardens the past season It forms circular grayish 

 spots on the leaves, causing them to be unfit for use, and final- 

 ly, to fall off. Very destructive. Found usually in company 

 of Peronospora efisua- 



SEPTORIA PRUNI, Ellis. Leaf spot of the plum. On leaves of 

 common plum (Prunus americana), giving them a spotted 

 appearance, not pleasant to behold, and damaging them con- 

 siderably. 



SEPTORIA RIBES, Desm. Gooseberry and currant leaf spot. 

 Quite abundant on leaves of gooseberry (Ribes rotundifolium), 

 and wild black currant (Ribes floridum) . Many instances of 

 its destructive character have been observed this season, par- 

 ticularly on the wild black currant. 



