THE FUNGI WHICH CAUSE PLANT DISEASE 287 



perithecia immersed, large, papillate-ostiolate; asci pedicellate, 

 8-spored; spores ovoid-fusiform; paraphyses present. 



A genus of about ten species, chiefly saprophytes. 



U. zonata Lev. is the cause of the commonest root disease of 

 tea and is common also on Hevea. 



