MINNESOTA BOTANICAL STUDIES. 
On Euphorbia maculata L.: Mille Lacs, (1) Jy. 1892, 
Sheldon 3136. 
Euphorbia serpyllifolia Pers.: Pine, (II, HI) Je. 1899, 
Freeman 528; Hennepin, (II, III) Jy. 1890, MacMillan. 
Euphorbia heterophylla L.: Wouston, (II, Il) Ag. 1899, 
Lyon 317. 
Euphorbia marginata PursH: Renville, (II, HI) Jy. 
1891, Sheldon 957. 
Euphorbia glyptosperma ENGELM.: Chisago, (II, II) 
Ag. 1892, Taylor 1568% ; Brown, (II, III) Jy. 1891, 
Sheldon 969 and 1170. 
Euphorbia sp. indet.: Renville, (II, III) 1890, Mac- 
Millan. 
6. U. polygoni (P.) Fcxi. Symb. Myc. 64. 1869. 
Of this very common species uredospores and teleutospores 
only can at present be reported. Some ecidium material on 
what appeared to be a Polygonum was found in 1900 in Wright 
county (Freeman 698), but the amount of material was insufh- 
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 Micux.: Brown, (II, II) 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. 
¥. U. caladii (Scow.) Fartow, Ellis N. A. Fungi, No. 232. 
1879. Abundant wherever Avzsema is found. 
On the leaves and spathe of: 
Arisema triphyllum (L.)Torr.: Blue Earth, (1) Je. 1891, 
Sheldon 114; Chisago, (III) S. 1893, Sheldon 6309; 
Hennepin, (I) My. 1899, Freeman 308; Ramsey, (1) 
My. 1899, Freeman 317; Houston, (I) Je. 1899, Lyon 
97; Hennepin, (I) My. 1899, MacMillan; Hennepin, 
(1) 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. 
