154 



Rumex Acctosella L. Hanover, Winnebago, Dixon, and Oquawka 

 areas, a common interstitial in the bunch-grass association, and in 

 cultivated ground, less frequently in the Panicuui pseudopubesccns 

 association. 



Riime.v sp. Hanover area, in the blowsand association. 



Polygoniiin avicidarc L. Oquawka area, a weed along roadsides 

 and in yards. 



Polygonum erectum L. Oquawka area, a common roadside weed. 



Polygoniiin tenuc Michx. Hanover, Oquawka, and Havana 

 areas, a common interstitial in the bunch-grass association and less 

 commonly also in the Panicum psciidopiibcscens association. 



Polygonclla articnlata (L. ) Meisn. Hanover and Dixon areas, 

 in the blowsand association; Hanover and Oquawka areas, in open 

 places in the black oak association. 



Chcnopodiaceac 



Cydolonia atriplicifolinm (Spreng.) Coult. Havana and Oquaw- 

 ka areas, in the blowsand and deposit associations. 



Chenopodinm album L. Hanover, Havana, and Oquawka 

 areas, common as a weed, occasional in the bunch-grass association 

 and in open places in the black oak forest. 



Amaranthaccae 



Froclichia Horidana (Nutt.) Moq. Dixon, Oquawka, and Havana 

 areas, usually in the blowsand association, occasionally an interstitial 

 in the bunch-grass association or open blowout deposits; Hanover 

 area, along- the railroad track, appearing as if introduced. 



Phytolaccaceac 



Phytolacca decandra L. Oquawka area, in waste places under 

 the shade of trees. 



AH'ctaginaceoe 



Oxybaphus nyctagincns (Michx.) Sweet. Hanover, Dixon, and 

 Oquawka areas, in the blowsand and blowout thicket associations, 

 an interstitial in the bunch-grass, and frequent as a weed in waste 

 places and along roads. 



lUccebraceae 



Anychia polygonoidcs Raf. Hanover, Havana, and Oquawka 

 areas, in the black oak association. 



