548 MINNESOTA BOTANICAL STUDIES. 
On Avena sativa L.: Brown, (II) Jy. 1891, Sheldon 1045. 
Fehamnus alnifolia L’HER.: Houston, (1) Ag. 1900, Lyon 
546; Ramsey, (1) My. 1899, Freeman 316; ; (1) t89035 
Sheldon 5963; Hennepin, (1) My. 1891, Sheldon 5969. . 
15. P. poculiformis (JAca.) WeTT. Verh. Zool.-Bot. Ges. 
Wien. 35: 544. 1885. (P. graminis PERS.) 
There is no good reason for not accepting Wettstein’s name. 
The species is exceedingly abundant although but few collec- 
tions have been made. 
On Avena sativa L.: Brown, (III) Jy. 1891, Sheldon 1104 ; 
Goodhue, (II) Ag. 1893, Anderson 710. 
Undetermined grasses : , (II, IIT) 1893, Sheldon 7120; 
, (II), 1893, Sheldon 7126. 
16: P. rubigo-vera (DC.) WinT. Die Pilze 1°: 217. 1884. 
On Triticum vulgare L.: Kandiyohi, (II) Jy. 1892, Frost 
285 and (II, III) 283%; Goodhue, (II, III) Ag. 1893, 
Anderson 711; Traverse, (III) S. 1893, Sheldon 7387. 
flordeum vulgare L..: Waseca, (II, III) Je. 1891, Sheldon 
529. 
C. BRACHYPUCCINIA. 
17. P. hieracii (Scuum.) Mart. Flora Mosq. 226. 1817. 
Jacky’s results (1. c.) can be utilized only in separating out 
the form on Varaxacum. Those on Averacium and Carduus 
require further cultural investigation on American specimens. 
On freracium canadense Micux.: Hennepin, (III) O. 
1889, MacMillan. 
Carduus sp. indet.: Winona, (II) Ag. 1888, Holzinger 41 ; 
, (II, III) 1893, Sheldon 6097 and 6059; Traverse, 
(II, IIT) S. 1893, Sheldon 7398; Ramsey, (II, II) S. 
1898, Freeman. 
18. P. taraxaci PLowrienT, Brit. Ured. and Ustil.: 186 and 
L875) 1Go9- 
This species seems to be founded on negative results of 
Plowright and recently of Jacky. Inoculations with Pucciniz 
from other composites gave in all cases negative results. 
On Taraxacum taraxacum(L.) Karst.: Traverse, (II) S. 
1893, Sheldon 7324; Hennepin, (II) Ag. 1883, Arthur; 
Ramsey, (II) My. 1899, Freeman 360; Hennepin, (II, 
III) S. 1898, Freeman. 
