298 IOWA ACADEMY OF SCIENCE Vol. XXVI, 191'.) 



E-RIGERON. 



E. philadclphiciis : Middle bridge. 

 E. annuiis : South 4th street, Osage. 

 E. canadensis: common weed. 



ANTENNARIA. 

 A. plantaginifolia: Middle bridge; Indian Head bluff. 



SILPHIUM. 

 S. laciniatum: roadside; prairie. 

 S. pcrfoliatiim : roadsides. 



PARTHENIUM. 



P. intcgrifolimn: six miles south of Osage. 



AMBROSIA. 

 A. trifida: roadsides, Osage. 

 A. artcmisiifolia: roadsides. Osage. 



A. psilostachya: roadsides, Osage. 



HELIOPSIS. 



H. scabra : Simpson farm, Lincoln township. 



RUDBECKIA. 

 R. laciniata : Simpson farm, Lincoln township ; roadsides. 

 R. hirta : common along the roadsides. 



BRAUNERIA. 



B. purpurea : roadsides on the prairie. 



HELIANTHUS. 

 H. anmins : river bank, Pierce's bridge to Middle bridge. 

 H. Icctiflorus : roadsides. 



H. grosscserrafus: Simpson farm, Lincoln township. 

 H. struniosus: river bank, Pierce's bridge to Middle bridge. 



COREOPSIS. 



C. palmata: Simpson farm, Lincoln township; St. Ansgar. 



BIDENS. 

 B. connata : river bank near the Old Mill. 

 B. triclwspcrnia : river bank near the Old Mill. 

 B. vulgata : Osage. 

 B. cernua : Pierce's bridge. 



GALINSOGA. 



G. parviflora: common weed. 



