220 



I I N(il AM) FUNGICIDES 



Like various other members of the family of rusts 

 to which this fungus belongs, it exists in three distinct 



FIG. 90. CLOVER RTJST. 



c, Cluster-cups and reciclium spores; <7, uredo spores ;/, uredo pustule on clover 

 leaf; e, teleuto spores; #, cross-section of stem showing mycelium between 

 cells; also two teleuto spores and one uredo spore. 



successive stages. Early in the season it appears prin- 

 cipally upon white clover plants in the so-called acid- 



