720 WEED FLORA OF IOWA 



Leonurus cardiaca, Motherwort. 



Mentha piperita., Peppermint. 



M. spicata, Spearmint. 



Satureja nepeta, Thyme. 



S. vulgaris, Basil. 



Marrubium vulgare, Hoarhound. 



Galeopsis tetrahit, Hemp nettle. 



Solanum nigrum, Black nightshade. 



S. carOlinense, Horse nettle. 



S. rostratum, Buffalo bur. 



Datura stramonium, Jimson weed. 



D. tatula, Purple thorn apple. 

 Verbascum thapsus, Mullein. 

 V. blattaria, Moth mullein. 

 Linaria vulgaris, Butter and eggs. 

 Veronica peregrina, Speedwell. 

 Plantago major, Common plantain. 

 P. rugelii, Rugel's plantain. 



P. lanceolata, Ribgrass. 



P. aristata, Bracted plantain. 



Compositae. 



Erigeron annuus, Daisy fleabane. 



E. canadensis, Fleabane. 

 E. ramosus, Whiteweed. 



Iva xanthifolia, Marsh elder. 



Ambrosia artemisiaefolia, Smaller ragweed. 



A. tripida, Greater ragweed. 

 Xanthium canadense, Cocklebur. 

 Gnaphalium uliginosum, Cudweed. 

 Inula helenium, Elecampane. 

 Heliopsis scabra, Ox-eye. 

 Rudbeckia hirta, Cone-flower. 

 Helianthus annuus, Common sunflower. 

 Bidens frondosa, Beggar-ticks. 



B. discoidea, Small beggar-ticks. 

 Dyssodia papposa, Fetid marigold. 

 Achillea millefolium, Yarrow. 

 Anthemis cotula, Mayweed. 

 Chrysanthemum leucanthemum, Ox-eye daisy. 

 Tanacetum vulgare, Tansy. 



