Davis — A Provisional List of Parasitic Fungi. 959 



POLYPORUS 



Hypocrea aurantiaca, 860 

 Hypomyces frondosus, 860 

 Hypomyces aurantius, 860 



PONTEDERIA CORDATA 



Cercospora pontederiae, 890 



POPULUS ALBA 



Marssonina castagnei, 881 



POPULUS BALSAMIPERA 

 Septoria musiva, 870 



POPULUS CANDICANS 



Marssonina castagnei, 881 



POPULUS DELTOIDES 



Marssonina castagnei, 881 

 Melampsora medusae, 913 

 Septoria musiva, 870 



POPULUS GRANDIDENTATA 



Fusicladum radiosum, 889 

 Marssonina castagnei, 881 

 Melampsora medusae, 913 



POPULUS TREMULOIDES 



Fusicladium radiosum, 889 

 Marssonina castagnei, 881 

 Melampsora medusae, 913 

 S'clerotium bifrons, 917 

 Septoria musiva, 870 

 Taphrina johansonii, 864 



POPULUS SPP. VARII 



Uncinula salicis, 855 



PORTULACA OLERACEA 



Albugo portulacae, 849 



POTAMOGETON 



Doassansia martianoffiana, 899 



POTENTILLA ANSERINA 



Ramularia arvensis, 886 



POTENTILLA ARGUTA 



Marssonina potentillae, 882 

 Tapbrina potentillae, 864 



