230 STATE HORTICULTURAL SOCIETY 



POLYMNIA, L. 



2999. P. uvedalia, L. Yellow Leaf-cup. 

 In rich soil ; not common. 



3000. P. canadensis, L. Small-flowered Leaf-cup. 

 Common on shaded rocky slopes. Not infrequent. 



SILPHIUM, L. 



3001. S. perfoliatum, L. Cup-plant. 

 Common in wet places. 



3002. 8. integrifolium, Michx. Entire-leaved Rosin Weed. 

 Common on prairies. 



3003. 8. laciniatum, L. Compass-plant. 

 Common on prairies. 



3004. 8. trifoliatum, L. Whorled Rosin-weed. 

 In woods. 



3005. 8. terebinthinaceum, Jacq. Prairie Dock. 

 Prairies and woods. 



PARTHENIUM, L. 



3006. P. integrifolium, L. American Fever-few. 

 In dry places ; not rare. 



HELIOPSIS, Pers. 



3007. H. scdbra, Dunal. Rough Ox-eye. 

 Common on dry prairies. 



ECLIPTA, L. 



3008. E. alba, (L.) Hassk. Eclipta. 



A weed introduced from tropical America. 

 RUDBECKIA, L. 



3009. R. triloba, L. Thin-leaved Cone-flower. 

 In thickets ; common. 



3010. E. subtomentosa, Pursh. Sweet Cone-flower. 

 Frequent in low prairies. 



3011. R. hirta, L. Black-eyed Susan. 

 Common in rather dry open grounds. 



3012. R. laciniata, L. Tall Cone-flower. 

 Common on moist ground. 



