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IOWA ACADEMY OF SCIENCE Vol. XXVI, 19iy 



Several blades and petioles bearing secia and pycnia, on two dif- 

 ferent plants, were discovered on January 13, 1919. A red clover 

 plant brought in on the same date (December 9, 1918) bore aecia 

 on January 15, 1919. These materials were used for inoculations, 



Fig. 84. — Aecia on a leaflet of a transplanted plant. (T. iiiediuiii L.) 



Fig. 85. — Aecia, magnified about one hundred and seventy-five times, showing 

 the nature of the peridial cells (recurving). (T. medium L.J 



