130 IOWA ACADEMY OF SCIENCES. 



G. hyhridum L. 



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

 W.), a common weed in waste places. 

 Salsola Kali L. , var. tragus Moq. 



Oaawa, Sioux City, Missouri Valley, Hawarden, Council 

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



POLYGONACEAE. 



Rumex verticiUatus L. 



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

 R. crisjjus L. 



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

 R. 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 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. la%)atMfolium L. , var. incarnatum Watson. 



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

 P. Pennsylvanicum L. 



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

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

 P. Mulileribergii Watson. 



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

 (L. H.>.). 

 P. Persiparia 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). 



