PLATE 56 

 Aphanomyces stellatus 



Fig. I. Tip of sporangium, showing spore duster with a good many empty cysts and two 



spores which remainded in the sporangium. 

 Fig. 2. Young oogonia, one showing the beginnings of the papillae. 

 Fig. 3. Young oogonium without papillae. 

 Fig. 4. Oogonium before formation of egg. 

 Fig. 5. Oogonium with oval-shaped egg. 

 Fig. 6. Oogonium without antheridium. 

 Fig. 7. Oogonium with papillae and single egg. 



All figures X 503- 



Aphanomyces scaber 



Fig. 8. Oogonium with ripe egg and attached hypha. 

 Figs. 9 and 10. Oogonia with ripe eggs. 



All figures X 810. 



