116 IOWA ACADEMY OF SCIENCES. 



Melilotus officinalis Willd. 



Sioux City (B. W.), Council Bluffs (L. H. P.). 

 M. alba Lam. 



Sioux City, along railroads, in streets, fields and roadsides, 

 abundant (L. H. P. and B. W.), Onawa, Turin (L. 

 H. P.). 

 Medicacjo sativa L. 



Sioux City, in streets; not common, Council Bluffs (L. H. P.). 

 Eosackia Purshiana Benth. 



Sioux City, loess mounds (B. W.). 

 Psoralea argophylla Pursh. 



Sioux City, adundant on loess mounds (B. W.), high 

 prairies and low, rich soil; Little Rock (Herb. C. R. 

 Ball), Hull (W. Newell). A typical prairie plant, com- 

 mon throughout Iowa on dry hills. 

 Amorplia canescens L. 



Sioux City, bottoms (B. W.), Missouri Valley (L. H. P.). 

 Dalea alopeciiroides Nutt. 



Near Lake Okoboji (B. W.), Missouri Valley, Sioux City, 

 loess mounds; abundant; Hawarden, in open grounds 

 ' (L. H. P.), Hamburg (Hitchcock Bot. Gazette, XIV, 

 128). 

 D. laxiflora Pursh. 



Sioux City (B. W.). The species is abundant on the loess 

 mounds about Sioux City, Missouri Valley and Turin, 

 producing a long and thick root. Hamburg (Hitch- 

 cock, Bot. Gazette, XIV, 128). 

 Petalostemon violaceus Michx. 



Sioux City abundant on loess hills (B. W., L. H. P.); Hull 

 (W. Newell); South Dakota opposite Hawarden dry 

 hills (L. H. P.); Logan (L. H. P.); Battle Creek (E. G. 

 Preston); Little Rock (C. R. Ball); Council Bluffs dry 

 hills (L. H. P.); Missouri Valley, Turin, loess hills (L. 

 H. P.). On loess mounds, usually with shorter heads 

 than commonly found on prairies. 

 P. candidus Michx. 



Sioux City, hills loess abundant; L. H. P. South Dakota 

 opposite Hawarden (L. H. P.); Hull.(W. Newell); Bat- 

 tle Creek (E. G. Preston); Little Rock (Herb. C. R. 

 Ball;) Council Bluffs, Turin, Missouri Valley, on loess 

 mounds, shorter heads and smaller plants than com- 

 monly found on prairies. 



