LIST OF ILLUSTBATIONS. 



CLOVER MILDEW. 



FIG. PAGE 



1. Peronospora trifoliorum, D.By., x 400. Conidium of 



do., xlOOO 10 



2. Peronospora exigua, "W.Sm., x 400. Conidium of 



do., xlOOO 12 



NEW DISEASE OF POTATOES. 



3. Potato steins with sclerotia of Peziza postuma, B. and 



Wils. Natural size 17 



4. Sclerotium of Peziza postuma, B. and Wils., x2 . 18 



5. Microscopic structure of the sclerotium of Peziza 



postuma, B. and Wils., x 400 . . . .19 



6. Peziza postuma, B. and Wils. Natural size . . 25 



7. Section through cap of Peziza postuma, B. and Wils. 



Enlarged 10 and 20 diameters .... 26 



8. Section through fragment of cap of Peziza postuma, 



B. and Wils., x400 27 



9. Asci, paraphysis, and sporidia of Peziza postuma, B. 



and Wils., x 500 27 



FUSISPORIUM DISEASE OF POTATOES. 



10. Fusisporium Solani, Mart. , x 400 . . . .32 



11. Spores of Fusisporium Solani, Mart., in different 



stages of growth, x 1000 33 



NEW DISEASE OF ONIONS. 



12. Puccinia, mixta, Fl., on flower scape of chives, x5 . 40 



13. Section through a sorus of Puccinia mixta, Fl., x 200 41 



14. Teleutospores of Puccinia mixta, Fl., x 1000 . . 42 



b 



