136 NATURAL HISTORY BULLETIN. 



Winnebago, Dickinson, Cerro Gordo, Lyon, Webster, Dal- 

 las, Story, and Emmet counties. Messrs. Nageland Haupt, 

 report the species from Scott county; Prof. Hitchcock from 

 Story county; Prof. Pammel from Sioux and Hamilton 

 counties; Prof. Fink from Fayette county; and J. P. Ander- 

 son by note from Lucas county. 



Bessey, Contr. to the Flora of Iowa in Fourth Report of the Iowa 

 Agr. Coll., p. 90, 1872; Arthur, Contr. to the Flora of Iowa, p. 5, 1876; 

 Halsted, Bull. Iowa Agr. Coll., 1888, p. 36; Hitchcock, Trans. St. Louis 

 Acad, of Science, vol. 5, p. 483; Nagel and Haupt, Proc. Davenport 

 Acad, of Nat. Sciences, vol. 1, p. 154; Pammel, Proc. Iowa Acad, of 

 Sciences, vol. 3, p. Ill; Fink, Proc. Iowa Acad, of Sciences, vol. 4, p. 83; 

 Fitzpatrick, Proc. Iowa Acad, of Sciences, vol. 5, pp. 108 and 134; vol. 

 6, p. 177; Manual of the Flowering Plants of Iowa, p. 3; Barnes, Reppert 

 and Miller, Proc. Davenport Acad, of Nat. Sciences, vol. 8, p. 200. 



Thalictrum polygamum Muhl. Cat. p. 54. 1813. 



Very similar to the preceding but differing in having no 

 glandular or waxy pubescence, while the filaments are 

 broadened. Torrey and Gray in Flora of North Amer- 

 ica, vol. 1, p. 38, 1838, referred this species to Thalictrum 

 cornuti L., a species entirely distinct, hence this name 

 becomes a synonym. In most cases where this species is 

 reported from Iowa it is under the Torrey and Gray name. 



Britton and Brown give the range as Labrador and Que- 

 bec to Florida, west to Ohio, a range far east of our limits. 

 It has been nevertheless frequently reported from various 

 localities in Iowa. From the material which has fallen 

 into our hands we have concluded that Thalictrum purpur- 

 asccns L. was the species examined and incorrectly labeled 

 T. polygamum Muhl. (T. cornuti L. of Gray's Manual.) 

 in most if not all cases. Prof. Bessey reports the species 

 from Story, Poweshiek, Fayette, and Floyd counties in his 

 Contributions to the Flora of Iowa in Fourth Report Iowa 

 Agr. Col., p. 90. Prof. Arthur lists the species in his cat- 

 alogue, p. 5, 1876, along with the other species mentioned 

 in this article. Prof. Hitchcock does not confirm Prof. 

 Bessey in his catalogue of the Ames flora. Messrs. Nagel 



