HEMIBASIDIOMYCETES 



335 



following season. In Puccinia malvacearum and other 

 allied species where teleutospores alone are produced, the 

 teleutospores germinate at the moment of maturity, and 



,. 



' 





FIG. 97. Phragmidiwn subcorlicatum, a common 

 parasite on rose-trees. i, rose branch and leaves, 

 infected with the aecfdium stage of the disease, which 

 forms deep orange, powdery masses ; 2, leaf with 

 numerous sori of teleutospores ; 3, teleutospores ; 4, 

 uredospores. Figs, i and 2, nearly nat. size ; remainder 

 highly mag. 



before they fall from the sorus; the secondary spores 

 formed infect other plants throughout the season after the 

 manner of uredospores in other species. 



