66 DAVENPORT ACADEMY OF NATURAL SCIENCES. 



Mrs. T. H. McBride, of Iowa City; J. G. Haupt, of Durant, Cedar 

 county; Mrs. M. C. Carter, of Hesper; Dr. George E. Ehinger, of 

 Keokuk; Prof. J. E. Todd, of Tabor, Fremont county; Dr. J. J. Davis, 

 of Racine, Wisconsin; George D. Butler, of Fort Jones, California; 

 and O. G. Young, of Raymond, Elackhawk county. Acknowledgment 

 should also be made to several well-known botanists for determination 

 of specimens submitted to them. Special thanks are due Prof. Bessey 

 for placing the herbarium and other facilities of the Iowa Agricultural 

 College at the service of the writer. Some information was obtained 

 from an illustrated and descriptive list of Iowa ferns represented in the 

 Agricultural College herbarium, compiled by Miss Ida Twitchell, and 

 published in the Aurora (the college paper) for October, 1880, under 

 the title of "Filices lowenses." Credit is also due Dr. George Engel- 

 mann, Mr. R. Hitchcock, and Mr. N. L. Britton, for assistance in trac- 

 ing the history of our Marsilia. 



I'he following plants, regarding which information has been furnished 

 by Mr. David F. Day, of Buffalo, New York, and other collectors, are 

 reported to be in the State, but are for the present withheld from the list, 

 because no specimens have yet been received: Cyc/oloina plafyphvllum, 

 Corispermuin hyssopifolhim^ Petalostenwn villosiis, Actinonieris helian- 

 thoides, Mitlgediitin acuiniiiatum. Verbena Aubletia, Carex Jiliforinis, and 

 Phegopteris polypodioidcs. 



The next contribution (No. VII. j will contain the mosses and Hver- 

 worts. Not many specimens have yet been communicated, and in the 

 region bordering the Mississippi River, where the most material is to be 

 expected, there are, unfortunately, few local collectors. The present 

 additions to the previously published lists are as follows : 



Phanerogamia. 



204-' Desijiodinm Dil/e/iii, Darl. Keokuk. 



243^ Fotentilla Fennsylvanica, L. Lyon county. 



270** Hamavielis Virginiea, L. Dubuque. 



288** Opimiia fragilis, Haw. Lyon county. 



459** Artemisia fi igida, \N\\\(\. Lyon county. 



508'' Chiniaphila i/iidh'/Iata, Nutt. Hesper. 



509'^ Ilex verticillata. Gray. Osage. 



539^ Veronica serpyllifolia, L. Iowa City. 



540^ Veronica arvensis, L. Hesper; Keokuk. 



600'' Lithospermurn aivense, L. Keokuk. 



624=" Solanum rostratum, Dunal. Fremont county; Council Bluffs. 



