72 BULLETIN 1366, U. S. DEPARTMENT OE AGRICULTURE 



PHILADELPHIA. 



Philadelphus spp., *S3 r ringa, mockorange. 

 Cercospora angulata Wint., leaf-spot. Mo. 

 Oymno sporangium gracilens (Pk.) Kern and Bethel, rust. Colo., Utah, 



N. Mex. 

 Phyllactinia corylea (Pers.) Karst., powdery mildew. Mont. 

 Ramularia philadelphi Sacc, leaf-spot. Wash. • 



Septoria philadelphi Ell. and Ev., leaf-spot. Wash. 



PHLEUM. 



P. pratense, timothy. 



Cercospora graminicola Tr. and Earle, leaf-spot. Miss. 



Claviceps microcephala (Wallr.) Tul., ergot. Ind., Ky., Alaska. 



C. purpurea (Fr.) Tul., ergot. Vt., Pa., Ind., Minn." 



Colletotrichum graminicolum (Ces.) Wils., anthracnose. Pa., Ohio, Ind., 



Minn. 

 Entyloma crastophilum Sacc, smut. 111., Wis., Iowa. 

 Erysiphe graminis DC, powdery mildew. Minn. 

 Heterosporium phlei G. T. Gregory, leaf -spot. N. Y., Pa. 

 Ophiobolus graminis Sacc, take-all. N. Y. 

 Puccinia coronata Cda., crown-rust. Iowa. 

 P. graminis Pers., stem-rust. General. 



Scolecotrichum graminis Fckl., leaf -spot. Widespread in Northern States. 

 Septoria sp., leaf-spot. Pa., 111. 



Sporotrichum poae Pk., silver top. N. Y., Ind., Iowa. 

 Ustilago striaeformis (West.) Niessl, stripe-smut. General. 



PHLOX. 



Phlox spp., phlox. 



Ascochyta phlogis phlogina Fairman, leaf-spot. Mass. 



Bacterium tumefaciens EFS. and Town. (Phytomonas tumefaciens (EFS. and 



Town.) Com. S. A. B.), crown-gaU. N. J. 

 Cercospora amphakodes Ell. and Hals., leaf-spot. Ind., Wis., Iowa. 

 C. phlogina Pk., leaf -spot. Va., Minn. 

 Erysiphe cichoracearum DC, powdery mildew. General. 

 Heterodera radicicola (Greef) Muell., root-knot. Mass. 

 Leptosphaeria phlogis Oud., leaf-spot. Md., Ind., Minn., Iowa, Nebr. 

 Phyllactinia corylea (Pers.) Karst., powdery mildew. Ohio. 

 Puccinia douglasii Ell. and Ev., rust. N. J., Pa., Nebr., Western States. 

 P. plumbaria Pk., rust. 111., Iowa, Nebr., Western States. 

 Septoria divaricata Ell. and Ev., leaf-spot. N. Y., Va., 111. 

 Sclerotium rolfsii Sacc, stem-rot. 111. 



Sphaerotheca humuli (DC.) Burr., powdery mildew. Ohio, Kans. 

 Tylenchus dipsaci (Kuehn) Bast., stem nematode. N. J. 

 Uromyces polemonii (Pk.) Arth., rust. S. C, Miss., Ind., 111., Wis., Iowa. 



PHOENIX. 



P. canariensis, Canary Island date palm. 



Exosporium palmivorum Sacc, leaf-spot. La., Tex. 



Graphiola phoenicis (Moug.) Poit., false smut. Fla., La., Miss., Tex., Calif.; 

 in hothouses in North. 

 P. dactylifera, date palm. 



Exosporium palmivorum Sacc, leaf-spot. La. 



Graphiola phoenicis (Moug.) Poit., false smut. Fla., Tex., Ariz., Calif. 

 P. reclinata. Senegal date palm. 



Graphiola phoenicis (Moug.) Poit., false smut. S. C. 

 PHOTINIA. 



P. arbutifolia, Christmasberry. 



Cercospora heteromeles Hark., leaf-spot. Calif. 



Fabraea maculata (Lev.) Atk., leaf-spot. Calif. 



Fusicladium photinicola R. L. McClain, scab. Calif. 



Phyllosticta heteromeles Cke. and Hark., leaf -spot. Calif. 



Septoria photiniae Berk, and Curt., leaf -spot. Calif. 



