71 71 718 WEED FLORA OF IOWA 



Leguminosae. 



Cassia chamaecrista, Partridge pea. 



Genista tinctoria. Dyer's greenweed. 



Crotalaria sagittalis. Rattle-box. 



Trifolium arvense, Stone clover. 



T. PEOCUMBENS, Low Lop clover. 



T. procwmhens, Low hop clover. 



T. repens, White clover. 



Meulotus officinalis. Yellow sweet clover. 



M. AiiBAj White sweet clover. 



Medicagk) lupulina. Black medick. 



Dalea alopecuroides. Pink dalea. 



RoBiNiA PSEUDO-ACACIA, Falsc acacia. 



Gltotbrhiza liEPiDOTA, Liquorice. 



ViciA SATIVA, Vetch. 



V. villosa, Hairy vetch. 



Stbophostyles pauciflora, Wild bean. 



Oxalidaceae. 

 OxAus CORNICULATA, Lady's sorrel. 



&eraniaceae. 

 Geranium maculatum. Wild eranesbill. 



Euphorbiaceae. 



AcAiiTPHA viRGiNicA, Thrcc-seeded mercury. 

 Euphorbia preslh, Large spotted spurge. 

 E. MACuiATA, Spotted spurge. 

 E. COROLLATA, Flowcring spurge. 

 E. CTPARissiAS, Cypress spurge. 



Malvaceae. 



Abutilon theophrasti, Butterprint. 

 SiDA SPINOSA, Prickly sida. 

 Malva rotundifolia, Cheeses. 

 Hibiscus trionum, Shoo-fly. 



Onagraceae. 



Oenothera biennis. Evening primrose. 

 Gauea biennis. Biennial gaura. 



