INTRODUCTION. 7 
Id, Revision of Rumex (1892). 
References to Minnesota material. 
Wheelock: Genus Polygala in N. America, Torr. Mem. II, No. 4 
(1891). 
References to Minnesota material. 
Bailey; Study of the Genus Carex (1887). 
References to Minnesota material. 
Bailey: Types of the Genus Carex (1889). 
References to Minnesota material. 
*Sargent: N. Amer. Silva, vols. I, II, III,—(1890—). 
References to Minnesota plants. 
Johnson: Mycological Flora of Minn., Bull. Minn. Acad. Sei, (1877, 
1878, 1879). 
775 species of fungi, many doubtfully identified. 
*Arthur: Some Algae of Minn. supposed to Poison, Bull. Minn. Acad. 
Sci. Appx. (1883). 
Johnson: Mycological Flora in VI. Rep., Geol. and Nat. Hist. Sur- 
vey (1876). 
558 species listed; many doubtful. 
Gray: Revisional papers in Proc. Am. Acad., (1883-1888). 
Watson: Revisional papers in Proc. Am. Acad., (1885-1891). 
Britton: Revisional papers in Trans. N. Y. Acad., (1887—). 
In all of these occasional references to Minnesota material are to be 
looked for. 
Macoun: Flora of Canada, (1883—). 
References to northern border localities. 
Upham: Geographic Limits of species of Plants in the Basin of the 
Red river of the North, Bost. Nat. Hist. Soc. Proc. (1891). 
*Gray: Synoptical Flora (1886). 
Many references to Minnesota. 
Reports of Minn. Hort. Soc., Forestry Comm., Agric. Soc. and Ex- 
periment Station. (1870—). 
Wolle: Algae of Minneapolis, Bull. Torr. Club., X, 13-21 (1883). 
Enumeration of species new to U.8§.. collected near Minneapolis by 
Miss Eloise Butler. 18sp., 8 forms new to science. 
Wolle: Desmids of U. S. (1884). 
References to Minnesota localities. 
Id. Fresh-water Algae of U. S. (1887). 
References to Minnesota localities. 
Journal of Mycology, (1885—). 
Occasional scattered allusions to Minnesota localities and fungi. 
Houghton: Loc. Plants coll. in N. W., Exp. (1834). 
*Riddell: Syn. Fl. W. States (1835). 
References to Minnesota localities. 
Lapham: Grasses of Wisc. and adjacent States, Trans. Wisc. Agric. 
Soc., III, 397-488 (1853). 
Whitney: Flora of Lake Superior Region; Foster and Whitney’s 
Rep. Geol. Lake Sup. Land Dist., IT, 359-381 (1851). 
Pammel: Weeds of S. E. Wisc. and Minn. (1887). * 
*Leonard: Filical Fl. Minn., Bull. Mion. Acad, Sci. (1877-78). 
