THE SPORES. 57 



fungus, than the manner in which it comes out 

 and spots the parts of the plant where it vege- 

 tates. To see the form of the spores requires 

 a very high power of the microscope, by which 

 it may first be viewed as an opaque object, and 

 then a small bit should be scraped off and 

 treated in the way described in the case of 

 puccinia graminis. The spores will appear of 

 the forms accurately exhibited in a drawing by 

 Mr. Leonard, from a specimen given him by 

 the author to examine and figure. The fine 

 threads of the mycelium, or spawn, are ex- 

 tremely well shown. Thus magnified, the 

 organization of these fungi is perceived to be 

 beautifully delicate, and the red gummy pow- 

 der is found to be composed of innumerable 

 spores growing from the spawn-threads, as 

 here represented. 



Spores of uredo, magnified 240 diameters, sliowing the 

 mycelium. 



The botanist therefore becomes completely 



