THALLOPHYTES : FUNGI 



61 



Fig. 44. Head of rye attacked by " er- 

 got " (a), peculiar grain-like maeees 

 replacing the grains of rye ; also a 

 mass of "ergot" germinating to 

 form spores (b). — After Tulast^e. 



Fig. 4G. A cup-fungus iPitya) grow- 

 ing on a fipruce (Pzcea). —After 

 Rehm. 



In some of these forms the ascocarp is completely closed, 

 as in the lilac mildew ; in others it is flask-shaped ; in 

 others, as in the cup-fnngi, it is like a cup or disk ; but in 

 ill] the spores are inclosed by a delicate sac, the ascus. 



