FIG. 75. Claviceps purpurea, or ergot. i, ergot on rye-grass; 2, 

 ergot on rye : the black, horn-like bodies are stromata or sclerotia of the 

 fungus, and bear the conidial form of fruit ; 3, portion of conidial form of 

 fruit produced on a stroma : the conidia are mixed with a sweet sub- 

 stance attractive to flies ; 4, a stroma bearing the stalked ascigerous form 

 of fruit, after lying on the ground throughout the winter ; 5, head or 

 fertile portion of ascigerous fruit, showing the warted surface due to the 

 projecting mouths of the perithecia : the section shows the numerous peri- 

 thecia sunk in the fleshy stroma; 6, an ascus containing eight needle- 

 shaped spores ; 7, a single spore. Figs, i and 2, nat sjze ; the remainder 

 mag. 



