170 



Helianthns occidcntalis Riddell, var. illinocnsis (Gleason) Gates. 

 With the species, especially in more shaded places ; occasional in the 

 mixed forest association. 



HeliantJius striimosiis L. Winnebago, Amboy, and Havana areas, 

 in the black oak forest, and persisting as a relic in the bur oak and 

 mixed forest associations. 



Coreopsis palmata Nutt. Hanover, Winnebago, Amboy, and 

 Oquawka areas, in the bunch-grass and black oak associations, rare 

 as a relic in the bur oak forest ; Havana area, in the mixed forest. 



Hymenopappus carolinensis (Lam.) Porter. In the black oak 

 association in the Kankakee area. 



Achillea Millefolium L. Winnebago, Amboy, Dixon, and 

 Oquawka areas, in the bunch-grass and black oak associations. 



Anthemis Cotula L. A weed in the Oquawka area. 



Artemisia caudata Michx. Very common in all seven areas in the 

 bunch-grass and black oak associations, occasional as a relic in the 

 Panicinn pseudopubescens association. 



Artemisia liidoznciana Nutt. Hanover area, occasional in the 

 bunch-grass and black oak forest; more abundant in shaded places 

 along fence-rows and thickets. 



Cacalia atriplicifolia L. Hanover area, on the perched dunes; 

 Winnebago area, in the bur oak forest; Havana area, in the black 

 oak and mixed forest associations, and occasionally in the bunch- 

 grass. 



Senccio Balsamilae Muhl. Hanover and Oquawka areas, in the 

 bunch-grass and black oak associations. 



Krigia virginica (L.) Willd. Havana area, in the black oak as- 

 sociation. 



Krigia amplcxicauUs Nutt. In the bur oak forest in the Winne- 

 bago area. 



Lactuca scariola L., var. integrata Gren. & Godr. Oquawka area, 

 in the Stcnophylhis association. 



Lactuca canadensis L. Hanover, Havana, and Oquawka areas, in 

 the bunch-grass, occasional in the blowout thickets and the black oak 

 forest. 



Prenanthes alba L. Winnebago area, in the bur oak association, 

 or as a pioneer in the black oak forest. 



Hicraciuu! longipilniu Terr. In the l)lack oak forest in the Win- 

 nebago area. 



Hieracium canadense Michx. Hanover area, in the black oak as- 

 sociation. 



