THALLOPHYTES : FUNGI 



61 



FIG. 45. Two species of cup-fungus 

 (Peziza). After LINDAU. 



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

 got " (), peculiar grain-like masses 

 replacing the grains of rye ; also a 

 mass of "ergot" germinating to 

 form spores (b). After TULASNE. 



FIG. 46. A cup-fungus (Pitya) grow- 

 ing on a spruce (Picea). 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-fungi, it is like a cup or disk ; but in 

 all the spores are inclosed by a delicate sac, the ascus. 



