71 716 WEED FTLORA OF IOWA 



Polygonaceae. 



RuMEX CEisPus, Curled dock. 



R. Aunssiuvs, Pale dock. 



R. sANGtriNEUs, Bloody dock. 



R. ACETOSELLA, Sheep sorrel. 



Polygonum avicxjlaee, Knotweed. 



P. EEECTUM, Larger knotweed. 



P. LAPATHipoLiuM, Slender smartweed. 



P. MuHLENBERGii, Marsh smartweed. 



P. PENNSYiiVANiCTJM, Pennsylvania smartweed. 



P. ACRE, "Water smartweed. 



P. PERSicAEiA, Lady's thumb. 



P. CONVOLVULUS, Black bindweed. 



Chenopodiaceae. 



Chenopodium Botets, Jerusalem oak. 



C. ALBUM, Goosefoot. 



C. HYBEiDUM, Maple-leaved goosefoot. 



Ateiplex patula, Orach. 



Cycloma ateiplicifolium. Winged pigweed. 



KocHU. scoPAEiA, Mexican fireweed. 



Salsola kali vae. tenuipolia, Russian thistle. 



Amaranthaceae. 



Amaeanthus eeteoflexus, Green pigweed. 

 A. GEAECiZANS, Tumble weed. 

 A. BLiToiDES, Prostrate pigweed. 



ACNIDA TUBEECULATA V. PROSTEATA, Water hcilip 



Nyctaginaceae. 



OXYBAPHUS NYCTAGINEUS, Wild foUr-0 'clock. 



Oaryophyllaceae. 



Stellaeia MEDIA, Chicl?weed. 



Cerastium nutans, Mouse-ear chickweed. 



Ageostemma githago, corn cockle (wheat secticnt^' 



Lychnis alba. White campion. 



L. dioica, Red campion. 



Silene latifolia, Bladder campion. 



S. NOCTiFLOEA, Night-flowcring catchfly. 



S. ANTiEEHiNA, Sleepy catchfly. 



