168 DISEASES OF FIELD & GARDEN CROPS. [CH.XXIV. 



Here we come to a halt similar to the one we came to 

 at the conclusion of the description of Puccinia graminis, 

 Pers. Some botanists believe that ^Ecidiam Berberidis, 

 Pers., is probably complete in itself, others state that the 

 jO/cidium spores will not enter the organs of transpiration of 

 barberry leaves, but will only enter the stomata of grasses, 

 and tli at then they produce, not an JEcidium,, but a Uredo, 

 viz. Uredo linearis, Pers., the first stage of the fungus of 

 the summer mildew of corn, Puccinia graminis, Pers. It 

 will be remembered that a similar phenomenon was said 

 to hold good with the fungus of spring mildew of corn 

 and the fungus of borage blight. 



We will now impartially review the evidence brought 

 forward on both sides of this disputed question, withhold- 

 ing nothing as far as our knowledge goes for or against 

 the alleged connection of Puccinia and j*Ecidium. 



