130 IOWA ACADEMY OF SCIENCES. 



G. hybrid mn L. 



Missouri Valley, Turin, Onawa (L. H. P.); Sioux City (B. 

 W.), a common weed in waste places. 

 Salsola Kali L., var. tragus Mcq. 



Onawa, Sioux City, Missouri Valley, Hawarden, Council 

 Bluffs (L. H.P.), spreading rapidly. 



POLYGONACEAE. 



Rumex verticillatus L. 



Missouri Valley, in swamps, common (L. H. P.). 

 R. crispus L. 



Council Bluffs, weed in streets (L. H. P. observations). 

 R. mar it in turn L. 



Sioux City (B. W.); Little Rock (C. R. Ball), in low 

 grounds. 

 R. Acetosella L. 



Missouri Valley, Turin, weedy in yards and fields (L. H. P.). 

 Polygonum aviculare L. 



Sioux City (B. W.); Hawarden, weed in yards (L. H. P.); 

 Missouri Valley. 

 P. erectum L. 



Missouri Valley, common weed in streets (L. H. P). . 

 P. ramosissimum Michx. 



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

 (L. H. P.). 

 P. lapathifolvum L. , var. incarnatum Watson. 



Sioux City, (B. W.); Turin, low grounds (L. H. P.). 

 P. Pennsylvanicum L. 



Logan, Turin, Onawa, Missouri Valley, low grounds, (L. 

 H. P.); Hull (N. Newell). 

 P. Muhlcnbergii Watson. 



Sioux City (B. W.), common along the Missouri liver 

 (L. H. P.). 

 P. Persicaria L. 



Hull (W. Newell); Sioux City (B. W.). 

 P. orientate L. 



Missouri Valley, an escape from cultivation (L. H. P.). 

 P. acre HBK. 



Hull (W. Newell). 

 P. Virgin ic num L. 



Sioux City (B. W). 

 P. Convolvulus L. 



Sioux City (B. W.), Hull (W. Newell). 



