130 IOWA ACADEMY OF SCIENCES. 



G. Jiyhrklum 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, Ha war den, Council 

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



POLYGONACSAE. 



Rumex vertkillatus L. 



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

 R. crispus L. 



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

 B. maritimum 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 avicula,re L. 



Sioux City (B. W.); Ha warden, weed in yard, (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. la2)athifoUum Li. , var. incarnatumW a,t5on. 



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

 P. Pennsijlvanicum L. 



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

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

 P. MuJilenbergii Watson. 



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

 (L. H. P.). 

 P. Persicaria L. 



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

 P. orientale L. 



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

 P. acre HBK. 



Hull (W. Newell). 

 P. Virginianum L. 



Sioux City (B. W). 

 P. Convolvulus L. 



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



