EXPLANATION OF PLATE. 



Fig. 1. Synchytrium papillattim, sorus and two galls with resting spores, about 125 diameters. 



Fig. 2-3. 5. Amsinckiae, sections through sorus and three galls with resting spores, about 140 diameters. 



Fig. 4. S. Amsinckiae, zoospores, from stained preparation, 500 diameters. 



Fig. 5. 5. innominalum, section through sorus and resting spore, about 150 diameters 



Fig. 6-7. 5. Andinum, sections through sorus and two resting spores, about 120 diameters. 



