548 MINNESOTA BOTANICAL STUDIES. 



On Avena sativa L. : Brown, (II) Jy. 1891, Sheldon 1045. 



Rhamnus alnifolia L'HER. : Houston, (I) Ag. 1900, Lyon 



546 ; Ramsey, (I) My. 1899, Freeman 316 ; , (I) 1893, 



Sheldon 5963 ; Hennepin, (I) My. 1891, Sheldon 5969. 



15. P. poculiformis QACQ^) WETT. Verb. 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, III) 1893, Sheldon 7120 ; 



, (II), 1893, Sheldon 7126. 



16. P. rubigo-vera (DC.) WINT. Die Pilze i 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. 



Hordeum vulgare L. : Waseca, (II, III) Je. 1891, Sheldon 



5 2 9- 



C. BRACHYPUCCINIA. 



17. P. hieracii (SCHUM.) MART. Flora Mosq. 226. 1817. 

 Jacky's results (1. c.) can be utilized only in separating out 



the form on Taraxacum. Those on Hieracium and Carduus 



require further cultural investigation on American specimens. 



On Hieracium canadense MICHX. : Hennepin, (III) O. 



1889, MacMillan. 

 Carduus sp. indet. : Winona, (II) Ag. 1888, Holzinger 41 ; 



, (II, III) 1893, Sheldon 6097 and 6059; Traverse, 



(II, III) S. 1893, Sheldon 7398; Ramsey, (II, III) S. 

 1898, Freeman. 



18. P. taraxaci PLOWRIGHT, Brit. Ured. and Ustil. : 186 and 



187. 1889. 



This species seems to be founded on negative results of 

 Plowright and recently of Jacky. Inoculations with Puccinias 

 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. 



