542 MINNESOTA BOTANICAL STUDIES. 



On Euphorbia maculata L. : Mille Lacs, (I) Jy. 1892, 



Sheldon 3136. 

 Euphorbia scrpyllifolia Pers. : Pine, (II, III) Je. 1899, 



Freeman 528; Hennepin, (II, HI) Jy. 1890, MacMillan. 

 Euphorbia heterophylla L. : Houston, (II, III) Ag. 1899, 



Lyon 317. 

 Euphorbia marginata PURSH : Renville, (II, III) Jy. 



1891, Sheldon 957. 



Euphorbia glyptosperma ENGELM. : Chisago, (II, III) 

 Ag. 1892, Taylor 1568^; Brown, (II, III) Jy. 1891, 

 Sheldon 969 and 1170. 



Euphorbia sp. indet. : Renville, (II, III) 1890, Mac- 

 Millan. 



6. U. polygon! (P.) FCKL. Symb. Myc. 64. 1869. 



Of this very common species uredospores and teleutospores 

 only can at present be reported. Some ascidium material on 

 what appeared to be a Polygonum was found in 1900 in Wright 

 county (Freeman 698), but the amount of material was insuffi- 

 cient for accurate and positive determination. 



On Polygonum aviculare L. : Winona, (III) on leaves and 

 stem, N. and O. 1893, Edna Porter; St. Louis, (II) Jy. 

 1886, Holway 5, 113 and 116. 



Polygonum ramosissimum MICHX. : Brown, (II, III) on 

 leaves and stem, Jy. 1891, Sheldon 1048; Lincoln, (III) 

 Ag. 1891, Sheldon 1545. 



Polygonum sp. indet. : Traverse, (III) on leaves and stem, 

 S. 1893, Sheldon 7253; Winona, (II, III) S. 1888, 

 Holzinger. 



7. U. caladii (Scnw.) FARLOW, Ellis N. A. Fungi, No. 232. 



1879. Abundant wherever Arisama is found. 

 On the leaves and spathe of : 



Arisama triphyllum (L.)ToRR. : Blue Earth, (I) Je. 1891, 

 Sheldon 114; Chisago, (III) S. 1893, Sheldon 6309; 

 Hennepin, (I) My. 1899, Freeman 308 ; Ramsey, (I) 

 My. 1899, Freeman 317 ; Houston, (I) Je. 1899, Lyon 

 97; Hennepin, (I) My. 1899, MacMillan; Hennepin, 

 (I) F. 1899, E. A. Cuzner (in university plant house) ; 

 Wright, (I) My. 1900, Freeman 581 ; Pope, (III) Jy. 



1892, Taylor 916; Winona, My. 1889, Holzinger. 



