IOWA ACADEMY OF SCIENCES. 123 



A. artemisiaefoUa L. 



Alton, Turin (L H P.); Sioux City (B. W.). A coaimon 

 weed in cultivated fields, pastures, meadows, along 

 roadsides, vacant lots, and railroads. 

 A. psilostadiya DC. 



Coun-jil Blaffs, common weed along creeks and river 

 courses in western Iowa (L, H. P.). 

 Xanthium Canadense Mill. 



Sioux City, Turin (L. H. P.). la alluvial soil very abun- 

 dant and weedy. South Dakota, opposite Hawarden, 

 bottoms of Big Sioux river (L. H P.). 

 Heliopsis scabra Dunal. 



Sioux City (B. W.); Hull (W. Neweli); Battle Creek, in 

 woods (E. G. Preston); Little Rock (Herb. C. R. Ball). 

 Echinacea angustifoUa DC. 



Sioux City (B. W.); Hull (W. Newell); Battle Creek, 

 abundant prairies (E. G. Preston); Council Bluffs, 

 Logan (L. H. P.); Little Rock (Herb , C. R. Bail). 

 RudhecMa laciniata L. 



South Dakota, opposite Hawarden in woods abundant (L. 

 H. P.); Sioux City (B. W.). 

 R. triloba L. 



Onawa, low grounds, common (L. H. P.) 

 R. Jiirta L. 



Sioux City (B. W.) Little R )ck (Herb. C. R. Ball ). 

 Lepaclujs pinnata Torr. & Gray. 



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

 Heliantlius annuus L. 



Sioux City (B. W.); Hawarden (L. H. P.); Oaawa, Mis- 

 souri Valley, (L. H. P.). A common weed everywhere 

 in western Iowa, flood plains, Missouri and Big Sioux 

 rivers, streets and dooryards. (L. H. P.). 

 H. rir/idus Desf. 



Hawarden (L H. P.); Sioux City (B. W.). 

 H. grosse-serratus Martens. 



Sioux City, abundant in alluvial bottoms of Missouri river, 

 and along river courses, creeks (L. H. P., B. W.); Onawa, 

 Turin. One of the most conspicuous plants in September. 

 H. Maxiiniliani Schrad. 



Sioux City, Loess hills along the Missouri and Big Sioux 

 rivers. Alton, Sioux Rapids, Hawardyn. occasionally in 

 alluvial bottoms at Y7hiting; also observed near Brad- 

 gate further east (L. H. P.). 



