164 



Asclepias amplexicatiUs Sm. In the black oak forest in the Han- 

 over, Winnebago, Amboy, Havana, and Oquawka areas ; also in the 

 bunch-grass association in the Dixon and Oquawka areas. 



Asclepias phytolaccoidcs Pursh. Hanover and Havana areas, in 

 the mixed forest association. 



Asclepias verticillata L. In the black oak and bur oak forests in 

 the Havana area, and along roadsides in the Hanover area. 



Acerates floridana (Lam.) Hitchc. In the windward slope as- 

 sociation in the Dixon area, probably a relic from the bunch-grass 

 association. 



Acerates viridiflora Ell. Hanover and Oquawka areas, in the 

 bunch-grass and basin associations, and occasional in the Panicum 

 pseudopubescens association; Winnebago area, in an open place in 

 the black oak forest. 



Acerates znridiflora Ell, var. lanceolata (Ives) Gray. Hanover 

 and Havana areas, characteristic of the basin association, and occa- 

 sional in the bunch-grass and Panicum pseudopubescens associations. 



Acerates viridiflora Ell, var. linearis Gray. Hanover and 

 Oquawka areas, in the basin and blowsand associations. 



Convolvulaceae 



Brezveria Pickeringii (M. A. Curtis) Gray. In the bunch-grass 

 prairies of the Oquawka area. 



Ipomoea hederacea Jacq. A weed in cultivated fields in the 

 Oquawka area. 



Polenwniaceae 



Phlox pilosa L. Perched dunes in the Hanover area. 

 Phlox bifida Beck. In the bunch-grass and black oak associations 

 in the Havana and Winnebago areas. 



Boraginaceae 



Lappula virginiana (L.) Greene. Havana area, in the mixed 

 forest association. 



Lithospermum Gnielini (Michx.) Hitchc. Abundant in all seven 

 areas, chiefly in the bunch-grass and black oak associations, more 

 rarely in the basin, blowsand, and Panicum pseudopubescens asso- 

 ciations. 



Lithospermum angustifolium Michx. In the bunch-grass asso- 

 ciation in the Havana area. 



