718 • WEED FLORA OF IOWA 



Leguminosae. 



Cassia chamaecrista, Partridge pea. 



Genista tinctoria, Dyer's greenweed. 



Crotalaria sagittalis, Rattle-box. 



Trifolium arvense, Stone clover. 



T. procumbens, Low hop clover. 



T. procumbens, Low hop clover. 



T. repens, White clover. 



Melilottjs officinalis, Yellow sweet clover. 



M. alba, White sweet clover. 



Medicago lupulina, Black medick. 



Dalea alopecuroides, Pink dalea. 



Robinia pseudo-acacia, False acacia. 



Glycyrrhiza lepidota, Liquorice. 



Vicia sativa, Vetch. 



V. villosa, Hairy vetch. 



Strophostyles pauciflora, Wild bean. 



Oxalidaceae. 

 Oxalis corniculata, Lady 's sorrel. 



Geraniaceae. 

 Geranium maculatum, Wild cranesbill. 



Euphorbiaceae. 



Acalypha viRGiNiCA, Three-seeded mercury. 

 Euphorbia preslh, Large spotted spurge. 

 E. maculata, Spotted spurge. 

 E. corollata, Flowering spurge. 

 E. cyparissias, Cypress spurge. 



Malvaceae. 



Abutilon theophrasti, Butterprint. 

 Sida spinosa, Prickly sida. 

 Malva rotundifolia, Cheeses. 

 Hibiscus trionum, Shoo-fly. 



Onagraceae. 



Oenothera biennis, Evening primrose. 

 Gaura biennis, Biennial gaura. 



