138 



PLANT MORPHOLOGY 



A B 



Fig. 113. Plorvriyhtia morhosa. A, section of stroma bearing young perithecia, X50; B, 

 a single peritheciuni with young asci and paraphyses, X 150. 



Fig. 114. Venturia inaequalis. A, conidiophores arising on lower side of apple leaf, X 600; 

 B, section of mature perithecium on old apple leaf, X 250. 



