42 MASS. EXPERIMENT STATION BULLETIN 202. 



PLATE II. 



Fig. 1. — Cros.s section of teliiun and leaf. 

 Fig. 2. — Teliospores. 



Fig. 3. — • Germinating urediniospore on leaf. 

 Fig. 4. — Haustoria and intercellular mycelium. 

 Fig. 5. — Cross section of uredinium and leaf. 



