126 ^v^KiYENPOST ACADEMY OF NATURAL SCIENCES. 



Contributions to the Flora of Iowa. -"'^ 



15Y .T. C. ARTHUR. 



The following list comprises all the species of Iowa plants brought to 

 my notice up to date, and not mentioned in my *•' Flora of Iowa." Speci- 

 mens of each from which the names were determined, are either in my 

 private herbarium, or in the herbarium of the Agricultural College, and 

 were all furnished by Dr. Geo. E. Ehinger of Keokuk, J. G. Haupt of 

 Davenport, Prof. C. E. Bessey of Ames, and R. Burgess of Ames. 



7Ga Draha verna, L. Ames. 



97a Hyx>ericum prolificum, L. Keokuk. 



110a Lychnis vespertina, Sibth. Decorah. 



207a Lespedeza violacea, Pers. Keokuk and Davenport. 



236a Agrmionia ixirviflora. Ait. Keokuk. 



353a Eupatoriimi altissinmm, L. Harrison County. 



362a Aster Shortii, Boott. Keokuk. 



365a Aster ericoides, L. Keokuk. 



369a Aster tenuifolius, L. Plymouth County. 



468a Senecio aureus, L. Var. obovatus, Gr. Ames. 



422a Aphyllon unijlorum, T. & G. Keokuk. 



427a Collinsia verna, Xutt. Keokuk. 



o33a Conohea multifida, Benth. Keokuk. 



539a Veronica Americana, Schw. Keokuk. 



o79a Monarda punctata, L. Cedar Rapids. 



638a Apocynum cannaMmim, L,. Y?ii\ imbescens, DC. Blackhawk Co. 



644a Asclepias quadrifolia, Jacq. Keokuk. 



670a Froelichia Floridana, Moq. Cedar Rapids. 



751a Salix sericea, Marshall. Plymouth Count" 



754a Salix lucida, Muhl. Plymouui Counuy. 



811a Trilliimi erectum, L. Decorah. 



843a Cyperus inflexus, Muhl. Ames. 



934a Glyceria fluitans, R. Br. Ames. 



Lespedeza capitata, var. angiistifoUa of the '• Flora of Iowa", (No. 209), 

 should be changed to L. leptostachya, Engelm. The following descrip- 

 tion of this new species is from Proceedings American Academy of Arts 

 and Sciences, Vol. XII (Dec. 1876): '■'• Lespedeza leptostachya, Engelm. 

 —Clothed with appressed, silky pubescence ; leaves linear ; petiole longer 

 than the terminal petiolule ; spikespaniculate, slender, somewhat loosely 

 flowered, rather longer than the peduncle ; legume equal to or slightly 

 longer than the calyx. Minnesota, T. J. Hale ; Illinois, Bebb. ; Iowa, J. 

 C. Arthur, Bessey. Has passed for L. angustifolia, from which its slen- 

 der spikes and paniculate habit at once distinguish it." 



Many names have been reported from different parts of the State, but 

 not being accompanied by specimens, it is thought best not to include 

 them in this list. Additions will be made as often as sufficient material 

 accumulates. 



Botanical Laboratory, Agricultural College, Ames, Iowa; March, 1877. 



