PUCCINIA. 



307 



closely packed parallel^chains of aecidiospores ; (3) the 

 wall of the aecidium. 



Fig. 65. PUCCINIA. Part of a Transverse Section of Barberry Leaf infected by 

 the Aecidium Stage of Puccinia. Note the Mycelium (in the Mesophyle), the 

 two Spermogonia (above), and the Aecidium (below). 



Note also the spermogonia, chiefly on the upper side of 

 the leaf ; each spermogonium resembles a miniature Fucus 

 conceptacle, and contains a dense mass of fine filaments. 



