720 WEED FLORA OF IOWA 



Leonurus cardmca. Motherwort. 



Mentha piperit^a, Peppermint. 



M. spicata, Spearmint. 



Satureja nepeta, Tbyme. 



S. VULGARIS, Basil. 



Marrubium vulgare, Hoarliound. 



Galeopsis ietrahit. Hemp nettle. 



SoLANUM NIGRUM, Black nightshade. 



S. CAEOLiNENSE, Horse nettle. 



S. KOSTEATUM, Buffalo bur. 



Datura stramonium, Jimson weed. 



D. TATULA, Purple thorn apple. 

 Verbascum thapsus, Mullein, 

 y. hlaUaria-, Moth mullein. 

 Linaria vulgaris. Butter and eggs. 

 Veronica peeegrinAj Speedwell. 

 Plantago major, Common plantain. 

 P. RUGELn, Eugel's plantain. 



P. LANCEOLATA, Ribgrass. 



P. ARiSTATA, Bracted plantain. 



Compositae. 



Erigeron annuus, Daisy fleabane. 



E. canadensis, Fleabane. 

 E. RAMOsus, Whiteweed. 



IvA xanthitolia. Marsh elder. 



Ambrosia artemisiaefolia. Smaller ragweed. 



A. TRiFiDA, Greater ragweed. 

 Xanthium canadense, Cocklebur. 

 Gnaphalium uliginosum, Cudweed. 

 Imda helenium. Elecampane. 

 Heliopsis scabra. Ox-eye. 

 RuDBECKiA HiRTA, Cone-flower. 

 Hemanthus annuus, Common sunflower. 

 BiDENS PRONDOSA, Beggar-ticks. 



B. DiscoiDEA, Small beggar-ticks. 

 Dyssodia papposa. Fetid marigold. 

 Achillea millefolium. Yarrow. 

 Anthemis cotula, Mayweed. 

 Chrysanthemum leucanthemum. Ox-eye daisy. 

 Tanacetum vuIjGare, Tansy. 



