Davis — A Provisional List of Parasitic Fungi. 953 



OAKESIA SESSILIFOLIA 



Phyllosticta cruenta discincta, 865 



OENOTHERA BIENNIS 



Peronospora arthnri, 853 

 Puccinia peckii, 906 

 Septoria oenotherae, 873 

 Uromyces plumbarius, 902 



OENOTHERA PUMILA 



Septoria oenotherae, 873 



ONOCLEA SENSIBILIS 



Uredinopsis rnirabilis, 914 



ONOCLEA STRUTHIOPTERIS 



Uredinopsis struthiopteridis, 915 



ORYZOPSIS ASPERIFOLIA 

 Puccinia milii, 903 



ORYZOPSIS RACEMOSA 



Claviceps, 860 



OSMORHIZA CLAYTONI 



Puccinia osmorhizae, 909 

 Ramularia reticulata, 887 

 Septoria osmorhizae, 874 



OSMORHIZA LONGISTYLIS 



Cercospora osmorhizae, 893 

 Puccinia osmorhizae, 909 

 Septoria osmorhizae, 874 



OSMUNDA CINNAMOMEA 



Uredinopsis osmundae, 915 



OSMUNDA CLAYTONIANA 



Uredinopsis osmundae, 915 



OSMUNDA REGALIS 



Uredinopsis osmundae, 915 

 Ustilago osmundae, 896 



OSTRYA VIRGINIANA 



Phyllactinia corylea, 858 

 Septoria ostryae, 870 



OXALIS CORNICULATA 



Microsphaera russellii, 857 



