126 



PLANT DISEASES 



growing on Shiere Common, near Guildford, nearly every 

 plant of which was attacked by the fungus. It is often 



Fig. 23. — Epichloe typhi na. i, fungus on leaf-sheath of 

 Holcus mollis ; 2, fungus on leaf-sheath oiHolcus la?tatus ; 



3, portion of fungus showing the warts on its surface 

 corresponding to the mouths of the perithecia ; slightly x ; 



4, section of a perithecium, X200 ; 5, an ascus showing 

 the spores escaping from its apex, x 400; 6, a single 

 spore, X400 ; 7, conidiophores with conidia, x 300. 



abundant on the grass growing on ditch banks and other 

 damp places, and from thence passes on to the pasture 



