FURTHER DESIDERATA 



The writer had hoped to add to this paper an annotated sys- 

 tematic list of all the plants, together with a discussion of sea- 

 sonal aspects, but the limited space renders this impossible at 

 present. This will be published later when the crytogams will 

 have been further elaborated, and a key to them will be included. 



Other subjects, such as zonal studies in the larger lakes, the 

 closer investigation of introduced forms, the detailed study of 

 variation in distribution and succession among the marsh and 

 aquatic plants, variations in the color of prairie flowers, etc., 

 offer a promising field. 



ACKNOWLEDGEMENTS 



In addition to the acknowledgements made in the body of this 

 paper the writer desires to express his appreciation of assist- 

 ance and materials furnished by the following persons: Presi- 

 dent Thomas H. Macbride of the State University; the writer's 

 assistants. Miss Lucy M. Cavanagh, Messrs. David H. Boot and 

 L. A. Giddings, and Misses Katherine Stewart, Nellie D. Fisher, 

 and Ella Shimek ; and Mr. R. I. Cratty, Professor L. H. Pammel, 

 and Mr. Noah D. Knupp. 



LITEEATUEE 



ToRREY, John. — Plants. — In Nicollet, J. N. — Eeport intended to illustrate 

 a Map of the Hydrographic Basin of the Upper Mississippi Eiver, 1843. 

 (Senate) 26th Congress, 2d Session.— Appendix B. 



White, Chas. A. — Eeport on the Geological Survey of the State of Iowa, 

 vol. I, 1870. Spirit and Okoboji lakes described, pp. 72-73. 



Arthur, J. C. — Contributions to the Flora of Iowa, no. VI. — ^Proceedings 

 of the Davenport Academy of Natural Science, vol. IV, 1884, pp. 64-75. 



Bessey, Charles E. and Arthur, J. C. — Bulletin of the Iowa Agricultural 

 College, 1884. Fungi. 



Fink, B. — The Lichens of Iowa. — Bulletins from the Laboratories of Nat- 

 ural History of the State University of Iowa, vol. Ill, 1895 ; pp. 70-88. 



Cratty, E. I. — Notes on the Aquatic Phenogams of Iowa. — Ibid., pp. 136- 

 152. 



Shimek, B.— Notes on the Flora of Iowa.— Ibid., 1896, pp. 195-215. 

 Pammel, L. H. — Notes on the Flora of Western Iowa. — Proceedings of the 



Iowa Academy of Sciences, vol. Ill, 1896, pp. 106-135. 

 Shimek, B. — Notes on Aquatic Plants from Northern Iowa.— Ibid., vol. IV, 



1897, pp. 77-81. 



Cratty, E. I. — ^The Iowa Sedges. — Bulletins from the Laboratories of Nat- 

 ural History, State University of Iowa, vol. IV, 1898, pp. 313-375. 



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