138 REPORT OF THE COMMISSIONER OF AGRICULTURE. 



Fia. o. Conidiophorc and rijie conidia from a growth on the cut surface of a tuber. 

 Three conidia have fallen off at i)oints indicated by the flask-shaped swell- 

 inp:3. The conidia vary somewhat in size, as shown. The one still at- 

 taclied sliows by comparison the average size. Examined in water. 

 Camera sketch, December 4, 1885. 



EXPIxiiNATION TO PLATE VIII. 



SPOT DISEASE OF ORCHARD GRASS. 



Fia. 1. A portion of a leaf of Dactylis glomerata, showing the characteristic spots, 



of the disease. 

 Fia. 2. A section through the leaf at one of the spots, showing the fungus causing 



the disease. 

 Fig. 2 A. Spores of the fungus, germinating. 



