356 



THE FARMERS HANDBOOK. 



r.\ 



D 



H 



Fig. 23.— Life History of Ergot (Claviceps purpurea). 



a. — < lonidial or sphacelial stage, b. — Ear of rye with se\eral ripe sclerotia (ergots), c. — An ergot 

 producing stalked bodies with swollen heads. d. - A longitudinal section through one of the heads, 

 showing the cavities in which the spore-sacs are home. e. — A single cavity showing the spore-sacs. 



F. — An ascus, or sac, showing eight thread-like spores. o. — A ruptured sac with escaping scores. 

 II. — A single spore. (A, after Brefeld ; H, after Strasburger ; c-n, after Tulasne.) 



