ulmifolia, Muhl. 



nemoralis, Ait. 



Misr-ouriensis, Nutt. 

 Canadensis, Linn. 



serotina, Ait. 



gigantea, Ait. 



lanceolata, Linn. 

 Chrysopsis villosa, Nutt. 

 Inula Helenium, Linn. 

 Polymnia Canadensis, Linn. 

 Silphium laciniatum, Linn. 



terebinthinaceum, Linn. 



trifoliatum, Linn. 



integrifolium. Michx. 



perfoliatum, Linn. 

 Parthenium integrifolium, Linn. 

 Ambrosia trifida, Linn. 



artemisisefolia, Lim> . 



psilostachya, D.C. 

 Xanthium strumarium, Linn. 

 Heliopsis laevis, Pers. var. scabra, Gray. 

 Echinacea angustifolia, D.C. 

 Rudbeckia laciniata, Linn. 



subtomentosa, Pursh. 



hirta, Linn. 

 Lepachys pinnata, Torr. & Gray. 

 Helianthus annuus, Linn. 



rigid us, Desf. 



laetiflorus, Pursh. 



occidentalis, Riddell. 



giganteus, Linn. 



grosse-serratus, Martens. 



strumosus, Linn. 



divaricatus, Linn. 



hirsutus, Raf. 



decapetalus, Linn. 



doronicoides, Lam. 



tuberosus, Linn. 

 Coreopsis lanceolata, Linn. 



palmata, Nutt. 



aristosa, Michx. 



trichosperma, Michx. 



discoidea, Torr. & Gray. 

 Bid ens frcndosa, Linn. 



connata, Muhl. 



cernua, Linn. 



chrysanthemoides, Micnx. 



Beckii, Torr. 

 Dysodia chrysanthemoides, Lag. 

 Helenium autumnale, Linn. 

 Maruta Cotula, D.C, 

 Achillea Millefolium, Linn. 

 Leucanthemum vulgare, Lam. 



