126 DAVENPORT ACADEMY OF NATURAL SCIENCES. 



Contributions to the Flora of Iowa, 



BY J. 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. 



76a Draha verna, L. Ames. 



97a HyperiQum prolificum^ L. Keokuk. 



110a Lychnis vespertina, Sibth. Decorah. 



207a Lespedezrx violacea, Pers. Keokuk and Davenport. 



236a Agrimonia pai-viflora, Ait. Keokuk. 



3.53a Eupatorium altissimum, L. Harrison County. 



362a Aster Shortii, Boott. Keokuk. 



36oa Aster ericoides, L. Keokuk. 



369a Aster tenuifolius, L. Plymouth County. 



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



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



427a Collinsia verna, Xutt. Keokuk, 



.533a Conobea niuUifida, Benth. Keokuk. 



o39a Veronica Americana, Schw. Keokuk. 



579a Monarda punctata, L. Cedar Rapids. 



638a Apocyniim cunnahinum.li. Y?iT. inihescens, DC Blackhawk Co. 



644a Ascle'ljias quadrifolia, Jacq. Keokuk. 



670a Froelichia Floridana, Moq. Cedar Rapids. 



75la Salix sericea, Marshall. Plymouth County. 



754a Salix lucida, Muhl. Plymouth County. 



81 la Trillium erectum, L. Decorah. 



843a Cyperus injlexus, Muhl. Ames. 



934a Glyceria fluitans, R. Br. Ames. 



Lespedeza capltata, var. angustifoUa 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 lepAostachya, Engelm, 

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

 than the terminal petiolule ; spikes paniculate, 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. angusiifolia, from which its 

 slender 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 suflScient material 

 accumulates. 



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



