288 



EXPERIMENT STATION BULLETIN. 



MICHIGAN WEEDS. 



Fig. 1 (10 

 ASCOMYCETES. 



Ergot. Spurred Rye. Claviceps purpurea (Fr.)[iTul. Fungi bearing spores pro- 

 duced in definite number (often 8) in specialized cells, asci. 



This is a poisonous fungus sometimes appearing on the grains of rye, timothy, 

 red top and other grasses and is mentioned here because its nature is frequently misun- 

 derstood. 



About fifteen of these growths are here represented as projecting from a spike of 

 meadow foxtail and four large growths from a spike of rye. This is only the first 

 stage of the fungus, of which there are several others not represented, appearing 

 the following year. 



