EXPLANATION OF PLATE. 



(Altered from Tulasne. ) 



7. Spores of Phragmidium incrassatum, Link, from the leaf of cultivated Rosa centi folia. 



2. Spore of the same treated "with sulphuric acid, and showing minute verrucosities : x 460. 



3. Spore of Phragmidium obtusum, Schm. and Kze. ; x 370- 



4 and 5. Spores of the same fungus germinating and producing promycelial spores. 



6. Spore of Uredo suaveolens, Pers., showing 3 germ-pores ; x 460- 



7. Promycelial spore of Phragmidium bulbosum, Schmidt and Kze., which has germinated 



and produced a secondary spore. 



8. Spores of Phragmidium bulbosum, two cells of the larger of which have germinated. 



9. Germinating spore of Uredo suaveolens, Pers. ; x460. 

 10- Uredo suaveolens, Pers., in Cirsium arvense ; x 430. 



7 7. Teleutospore of Puccinia compositarum, SchL, from leaves of Cirsium arvense ; x 460. 



12. Teleutospores of Uromyces appendiculatus (Faba), Lk., which have germinated and pro- 



duced promycelial spores ; x 430. 



13. Podisomajunipericommunis, Fr. 



14- Longitudinal section through one of the growths shown in 13 ; the right side of the -figure 

 shows the surface of the fungus and the manner of producing promycelial spores. 



