XXIX. A PRELIMINARY LIST OF MINNESOTA 

 UREDINE^E. 



E. M. FREEMAN. 



The following list comprises the Uredinese collected in Min- 

 nesota up to the present time, by the Botanical Survey Staff. 

 The materials are taken from the collections cited in my pre- 

 liminary list of Minnesota Erysipheae.* In addition to these 

 Dr. L. H. Pammel has made numerous collections at Hokah 

 and other points in southeastern Minnesota. These have not 

 been included in the present report but may be found in Tre- 

 lease's Parasitic Fungi of Wisconsin. f Puccinia anemones- 

 virginiantB is the only species collected by Dr. Pammel in Min- 

 nesota which has not been collected elsewhere in the State. 



No representatives of the Endophyllacese or of the Schizo- 

 sporaceae have yet been found in Minnesota. Of the Melamp- 

 soraceag five genera with seven species are reported, viz: 

 Chrysomyxa i species, Cronartium I, Cpleosporium i, Me- 

 lampsora 3, Calyptospora i ; of the Pucciniaceae seven genera 

 with 62 species: Uromyces 14, Puccinia 39, Gymnoconia i, 

 Uropyxis i, Gymnosporangium 4, Phragmidium 4, Triphrag- 

 mtum i ; of isolated ^Ecidia (including Peridermid) 30 ; of 

 isolated Uredo 2. 



On May n, 1900, there was collected in Mille Lacs 

 county a very large witches' broom on a white pine. The 

 broom measures fully 9 feet across. The distortion of the 

 branches is very pronounced and the leaves of the broom are 

 considerably smaller than the normal. The cause of the for- 

 mation cannot at present be positively ascertained. There are 

 no indications that the branches contain an abundant mycelium 

 and the material was collected early in the spring before ascidia 

 had time to form. So far as I am aware no authentic record of 

 a witches' broom upon pines caused by a fungus parasite exists. 



*Minn. Bot. Stud. 2< : 417. 1900. 



f Trans. Wise. Acad. Sci. A. and L. 6: 1884. 



537 



