PAPERS PRESENTED, 



THE DATE OF PRESENTATION ACCOMPANYING EACH PAPER. 



CONTRIBUTION TO THE FLORA OF IOWA.— No. V. 



BY J. C. ARTHUK. 

 Eead before the Davenport Academy of Sciences at the June meeting, 1882. 



The following list comprises the well authenticated additions to 

 the previously j)ul)lished lists of Iowa plants. The material for it has 

 been contributed by R. I. Cratty of Estherville, Emmett Co.; E. 

 W. Hoi way of Decorah; John Leiberg late of Sene}^ Plymouth Co.; 

 Dr. Geo. E. Ehinger of Keokuk; Prof. C. E. Bessey of Ames; 

 Mrs. M. C. Carter of Hesper, Winneshiek Co.; M. E. Jones of 

 Salt Lake City, Utah ; and the writer. 



193* Amorpha microphylla^ Pursh. Palo Alto and Clay Cos. 



244*^ JPotentilla j^cdustris, Scop. Emmett Co. 



305'^ Cicuta bulbifera^ L. Emmett Co. 



430^ Helianthiis Jfaximiliani, Schr. Emmett Co. 



455^ Artemisia annua, L. Keokuk. 



467* Senecio palustris^ Hook. Spirit Lake and Emmett Co. 



520^ Utricularia intermedia^ Hay. Emmett Co. 



606'' Mertensia paniculata^ Don. Decorah. 



607^ Echinospermum Itedoxoskii^ Lehm., var, occidentale^ 



Watson. Decorah. 



691* Rumex obtusifolius, L. Decorah. 



710* Euphorhia comiautata^ Engelm. Decorah. 



715* Ulmus racemosa, Thomas. Waverly and Charles City. 



757* Salix inyrtilloldes, L. Emmett Co. 



781* Potamogeton Illinoensis, Morong. Emmett Co. 



782^ Potamogeton perfoliatus^ L., var. lanceolatus^ Robbins. 



Emmett Co. 



784* Triglochin niaritimum^ L., var. elatum^ Gr. Emmett Co. 



784^ Scheuchzeria palustris, L. Emmett Co. 



787^ Sagittaria cristata, Engelm. ined. Emmett Co. 



