14 DISEASES OF FIELD & GARDEN" CROPS, [on. HI. 



not been able to detect the fungus in the leaf, but, 

 curiously enough, he gives an illustration of it in that 

 position ; he has not illustrated the spores, perhaps 

 because they so readily fall from their little pedicels in 

 Peronospora, and are easily overlooked. As this fungus 

 doubtlessly hibernates in the same manner as the last, the 

 only plan for lessening its ravages is to burn all decaying 

 clover material. 



This parasite is very near Ovularia (Ramularia) sphce- 

 roidea, Sacc. ; but if the published descriptions are correct, 

 our plant differs materially from the German examples. 



