Fig. 22. Claviceps purpurea. i, ergot on rye-grass ; 

 2, ergot on rye ; 3, section of a portion of the conidial 

 form of fruit, x 300 ; 4, a sclerotium or ergot bearing the 

 stalked, ascigerous form of fruit, natural size ; 5, head of 

 ascigerous form of fruit showing the warted surface 

 due to the projecting mouths of the perithecia ; also a 

 section, showing the perithecia sunk in the fleshy stroma ; 

 6, an ascus, x 300 ; 7, a single spore, x 300. 



