IOWA ACADEMY OF SCIENCES. 181 



Anacardiac^. 



Rhus glabra L. Clarke, Union, Adams, Montgomery, Potta- 

 wattamie, Ringgold, Taylor, Page, and Fremont counties: 

 thickets; common. 



R. taxicodendron L. Clarke, Adams, Montgomery, Potta 

 wattamie, Ringgold, Page, and Fremont counties; thickets and 

 waysides; frequent. R. radicans L, of the new nomenclature. 



POLYGALACE.E. 



Pohjgala senega L. Ringgold and Taylor counties; prairies: 

 common. 



P. verticiUafa L. Decatur and Fremont counties; dry soil; 

 frequent. The variety, ambigua Gray, of our preceding 

 papers, belongs here. 



Leguminos^. 



Baptisia leucopluea Nutt. Clarke, Union, Adams, and Ring- 

 gold counties. Prairies; frequent. 



B. leucanthi T. & G. Adams, Clarke, Union, Ringgold, Pot- 

 tawattamie, and Taylor counties. Prairies; common. 



(Jrotalaria sagifta/is L. Fremont county. A few specimens 

 found. Very common in dry, open, upland woods, Otoe county, 

 Nebraska. 



TrifoUicm pratense L. Clarke, Union, Adams, Montgomery, 

 Pottawattamie, Ringgold, and Fremont counties. Waysides; 

 common. 



T. reflexum L. Union county. One specimen found on river 

 bank. 



T. repens L. Clarke, Union, and Pottawattamie counties. 

 Waysides; common. 



T. Jtybridum L. Adams county. Waste places; infrequent. 



Jfelilotus officinalis Willd. Fremont county. Waste places; 

 frequent. 



J/, alba Lam. Clarke, Union, Adams, Pottawattamie, Mont- 

 gomery, Taylor, and Fremont counties. Waysides; common. 



Medicago sativa L. Fremont county. Waste places; infre- 

 quent. 



Psoralea. tenuiflora Parsh. Union and Ringgold counties. 

 Prairies; frequent. 



P. argophyUa Pursh. Clarke, Union, Adams, Montgomery, 

 Pottawattamie, Taylor, and Page counties. Prairies; common. 



P. escw/enta Parsh. Fremont county. Loess hills, probably 

 frequent. 



