HE FLORA OF EOWA. 



souri river, but the large tracts of country lying in the north- 

 west and southwest parts, with their rich and varied flora, 

 could not be reached. 



I am under many obligations for valuable contributions and 

 assistance to PROF. C. E. BESSEY, of the Iowa Agricultural 

 College, who published, in the "Fourth Biennial Report of 

 the Agricultural College, 1871," the first and only "Contribu- 

 tion to the Flora of Iowa" thus far made, and who has 

 since been indefatigable in his labors in the Botanical field. 

 I am also greatly indebted to J. W. CONGDON, of Fast 

 Greenwich, R. I., and to Dr. Geo. ENGELMANN, of St. Louis, 

 Mo., for the examination and determination of many speci- 

 mens. Also to the following gentlemen of the State for con- 

 tributions of specimens and lists of plants of their respective 

 localities: J. G. HauPT, Davenport, list of plants from the 

 advance sheets of the "Report of the Academy of Sciences" 

 of that place; E. W. Holway, Decorah; Dr. T. D. Kel- 

 logg, Doud's Station, list of plants from Lee County: Prof. 

 CALVIN, of the State University, Iowa City; Dr. Asa Horr, 

 Dubuque; Dr. Geo. M. KELLOGG, Carthage, 111., list of Lee 

 County plants; M. E. Jones, Grinnell; Rev. R. Burgess, late 

 of Woodbine; Dr. Wm. Young, Greene; I. R. S. Birch, 

 Birmingham; also, to L. L. CADWELL, conductor on the Mil- 

 waukee & St. Paul Railroad, Iowa Division, for assistance in 

 making collections. 



Gray's Manual, 5th edition, has furnished the basis of the 

 present work. Introduced plants are printed in italics. Vari- 

 eties are numbered the same as species for facility of reference 

 and exchange. When plants have been reported but from one 

 locality and without specimens, the locality has been generally 

 placed at the foot of the page. The common names have 

 been added for the use of those who prefer them. It has 

 been thought advisable to append descriptions of species and 

 revisions not included in Gray's Manual, 



Charles City, March 1, 1876. ' J. C. ARTHUR. 





