XXXI.] 



SMUT OF CORN. 



259 



Fig. 80, and others engraved to the same scale in this work. 

 Germination in water commences in less than twelve hours, 

 as at 1 ; as germination advances buds or conidia are 

 formed, as at 2, A A ; farther growth is seen at 3 and 4, 



FIG. 121. 



Spores of the Smut fungus, Ustilago carbo, Tul. , germinating. 

 Enlarged 1000 diameters. 



with fused or conjoined cells at B. This fusion is similar 

 with the conjugation seen in Tilletia. Still more advanced 

 growth is shown at 5 and 6. The long germ-tubes like 

 the one illustrated at 5, commonly fuse with other germ- 



