1 I NGI IMl'KRl !.( II 369 



throughout the autumn and winter and careful sections made at 

 different times. In the case of the blotch, as the season advances, 

 the cell aggregates may develop a definite sclerotial-like body 

 (November in Missouri). By March this body has differentiated 

 into a pycnidium (Fig. 188) 25 to 100/4 in diameter, of the 

 Leptothyrium type, bearing hyaline, elliptical spores. The latter 

 measure 12-14 x 2-3 p. 



