(2 



Vernonia fasciculata Michx., ironweed. 



" altissima Nutt., ironweed. 

 Kuhnia eupatorioides L., false boneset. 

 Liatris spicata Willd., blazing star. 



" cylindracea Michx., blazing star. 



" scariosa Willd., button snakeroot. 

 BoUonia aster aides L'Her., aster-like Boltonia. 

 Solidago rigida L., rigid goldenrod. 



" canadensis L., Canada goldenrod. 



" serotina Ait., late goldenrod. 



" Riddellii Frank, goldenrod. 



" graminifolia Salisb., grass-leaved goldenrod. 

 Aster novae-angliae L., New England aster. 

 " multiflorus Ait., many-flowered aster. 

 " vimineus Lam., many-flowered aster. 

 " paniculatus Lam., panicled aster. 

 " ericoides L., frost- weed aster. 

 Erigeron philadelphicus L., fleabane. 



" ramosus BSP. 

 Antennaria plantaginifolia Rich., plantain-leaved everlasting. 

 Silpkium laciniatumlu., compass-plant. 



" terebinthinaceum Jacq., prairie-dock. 



" integrifolium Michx., rosin weed. 

 Parthenium integrifolium L., feverfew. 

 Rudbeckia triloba L., thin-leaved cone-flower. 



" hirta L., black-eyed-Susan. 

 Heliopsis helianthoides Sweet, ox-eye. 

 Lepachys pinnata T. & G., cone flower 

 Helianthus strumosus L., sunflower. 



" grosseserratus Martens, sunflower. 

 " scaberrimus Ell., sunflower. 



Cacalia tuber osa Nutt., Indian plantain. 

 Senecio aureus L., golden ragwort. 



" Balsamitae Muhl., golden ragwort. 

 Cirsium virginianum (L.) Michx., thistle. 



" altissimum (L.) Spreng., thistle. 



" pumilum Spreng., pasture thistle. 



" lanceolatum Hill., bull thistle. 

 Krigia amplexicaulis Nutt., Virginia goatsbeard. 

 Lactuca canadensis L., wild lettuce. 



" ludoviciana Riddell, wild lettuce. 



III. AQUATIC ASSOCIATIONS 



These associations reach their best development in the shallow lakes 

 and ponds of the old lake plain and in the depressions in the sand dune 

 area. Others are found in connection with the development of the 

 stream system. The succession in these ponds, streams, and swamps 



15 



