THE FUNGI WHICH CAUSE PLANT DISEASE 



259 



L. tazicola R. K. on Taxus canadensis; 



L. vagabunda Sacc. spots linden branches. Its conidial form 

 is perhaps Phoma tilisB.^'' 



Ophiobolus Riess (p. 252) 



Perithecia scattered, subglobose, submembranous, covered or 

 suberumpent, ostiole papillate or elongate; asci cylindric; spores 

 fusiform, hyaline or yellowish. 



Fig. 190. — Ophio- 

 bolus. B, ascus; 

 C, spore. After 

 Lindau and Win- 

 ter. 



Fig. 191. — Pleospora from 

 passion-fruit. The spores 

 are just beginning to ger- 

 minate, the end cells start- 

 ing first. After Cobb. 



A genus of some one hundred twenty-five species. 

 O. graminis Sacc. and O. herpotrichus Sacc. occur on grasses 

 and are quite injurious in Europe.^'' 

 O. oryzeae Miy. is found on rice.'"^ 



Pleospora Rabenhorst (p. 252) 



Perithecia covered at first, later more or less erumpent, usually 

 membranous, black, globose; asci oblong to clavate; spores elon- 

 gate or ovate, muriform; paraphyses present. 



