80 BULLETIN 1366, U. S. DEPARTMENT OF AGRICULTURE 



PLATANUS. 



Platanus sp., *sycamore, planetree. 



Armillaria mellea (Vahl) Quel., root-rot. Md., W. Va. 

 Cercospora platanicola Ell. and Ev., leaf -spot. Ga., La. 

 Gnomonia veneta (Sacc and Speg.) Kleb., anthracnose. General. 

 Microsphaera alni (Wallr.) Wint., powdery mildew. East of Great Plains. 

 Phleospora multimaculans Heald and Wolf, leaf-blight. Tex. 

 Phoradendron flavescens (Pursh) Nutt., mistletoe. Calif. 

 Phyllosticta platani Sacc. and Speg., leaf -spot. Ala., Kans. 

 Septoria platanifolia Cke., leaf-spot. Md., S. C. 



Stigmina platani (Fckl.) Sacc, leaf-spot. W. Va., Ga., Miss., Okla., Ark., 

 Ind., 111., Mo., Calif. 



POA. 



P. compressa, Canada bluegrass. 



Erysiphe graminis DC, powdery mildew. Minn. 



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



Puccinia coronata Cda., crown-rust. Mo., Kans. 



P. epiphylla Wetts., rust. Minn., Colo. 



P. graminis Pers., stem-rust. Pa., Ind., Mich. 



Scolecotrichum graminis Fckl., leaf-spot. Wis., Minn., Nebr. 

 P. pratensis, Kentucky bluegrass. 



Claviceps microcephala (Wallr.) Karst., ergot. Ind. 



C. purpurea (Ft.) Tul., ergot. Ky., 111., Minn. 



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



Corticium vagum Berk, and Curt., brown-patch. General. 



Entyloma irregulare Johans., smut. 111., Minn. 



Epichloe typhina (Pers.) Tul. Del. 



Erysiphe graminis DC, powdery mildew. General, especially east of Great 

 Plains. 



Helminthosporium vagans Drechs., leaf -spot. New England, N. Y., Pa., Md., 

 111., Wis. 



Phyllachora graminis (Pers.) Fckl., tar-spot. Nebr. 



Puccinia glumarum (Schm.) Eriks. and Henn., stripe-rust. Idaho. 



P. epiphylla Wetts., rust. General. 



P. triticina Eriks., leaf -rust. Colo. 



Sclerotium sp., damping-off. 



Scolecotrichum graminis Fckl. Pa., Ind., Minn. 



Septoria sp., leaf -blotch. Pa., Ind., Wis., Minn. 



Uromyces poae Rabh., rust. Ind. 



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



POINCIANA. 



P. regia, royal poinciana. 



Gloeosporium sp., anthracnose. Fla. 

 POPULUS. 



Populus spp., poplar, cottonwood, aspen. 



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

 Town.) Com. S. A. B.), crown-gall. Conn., N. J., Minn., Kans., Wyo., 

 Utah. 



Cercospora populina Ell. and Ev., leaf -spot. Ala., La. 



Cladosporium subsessile Ell. and Barth., leaf-spot. Wis. 



Cytospora chrysosperma (Pers.) Fr., canker. General. 



Dimerosporium populi Ell. and Ev., sooty mold. Mont. 



Dothichiza populea Sacc. and H. Briard, canker. General east of Great 

 Plains. 



Fomes applanatus (Pers.) Wallr. (Ganoderma applanatum (Pers.) Pat.), white- 

 streaked rot. Conn., Minn., N. Dak., S. Dak., N. Mex. 



F. everhartii (Ell. and Gall.) Schrenk, white-rot. Mont. 



F. fomentarius (L.) Fr., white sapwood rot. Minn. 



F. igniarius (L.) Fr., white heart-rot. General. 



Hypoxylon pruinatum (Klotzsch) Cke., canker. Me., N. Y., Mich. 



Marssonia brunnea (Ell. and Ev.) Sacc, anthracnose. N. J., Wis., Wash. 



M. curvata Bub. and Kab., leaf-spot. Utah. 



M. populi (Lib.) Magn., leaf -spot. Wis. 



