Mudplantains, Heteranthera spp. - Rice (23) 



Mustard, Brassica kaber - Small grains (19, 20), flax (21), legume seedlings (34) 



Ninnblewill, Muhlenbergia schreberi - Lawns and turf (50) 



Oaks, Quercus spp. - Pastures and range (37) 



Orchardgrass, Dactylis glomeratus - Lawns and turf (50) 



Paragrass, Panicunn. purpurascens - Ditchbank weeds (43) 



Parrotfeather, Myriophyllum proserpinacoides - Submersed weeds (47) 



Pennycress, Thlaspi arvense - Flax (21) 



Pennywort, Hydrocotyl sibthorpioides - Lawns and turf (50) 



Pickerelweed, Pontederia spp. - Emergent and nnarginal weeds (48) 



Pigweed, Amaranthus spp. -Corn (18, 19), small grains (20), flax (21), 



cotton (21, 22), soybeans (22), peanuts (23), Irish potatotes (29), legume 



seedlings (34), pastures (36) 

 Plantain, Plantago spp. - Snnall grains (20), lawns and turf (51) 

 Pondweeds, Potamogeton spp. - Submersed weeds (46, 47) 

 Prickly lettuce, Lactuca scariola - Small grains (20) 

 Princes plume. Polygonum orientale - Pasture and range (37) 

 Purple nutsedge, Cyperus rotundus - Irish Potatoes (29), Cropland (42) 

 Purslane, Portulaca oleracea - Lettuce (28), onions (28) 

 Quackgrass, Agropyron repens - Irish potatoes (29), perennial grasses, 



rushes and sedges (41), ditchbank weeds (43), lawns and turf (50) 

 Rabbitbrush, Chrysothamnus spp. - Pasture and range (37) 

 Ragweed, Ambrosia spp. - Corn (18, 19), small grains (20), flax (21), beans 



(26), legume seedlings (34), pastures (36), see also broadleaved perennials (41) 



Red sorrel, Rumex acetosella - Lawns and turf (50) 



Red stem, Ammannia coccinea - Rice (23) 



Reed, Phragmites communis - Ditchbank weeds (44) 



Russian knapweed, Centaurea repens - See broadleaved perennials (40) 



Russian thistle, Salsola kali - Flax (21) 



Sandbur - Cenchrus pauciflorus - Lawns (50) 



Sand sagebrush, Artemisia filifolia - Pasture and range (37) 



Sedges, Cyperus spp. - Rice (23) 



Shepherdspurse, Capsella bur sa-pastoris - Small grains (20) 



Silvery lupine, Lupinus spp. - Pasture and range (37) 



Smartweed, Polygonum pensylvanicum - Corn (18), small grains (20), beans 



(26), onions (28), emergent and marginal weeds (48) 

 Sneezew^eed, Helenium nudiflorum - Legume seedlings (34), pastures (36), 



pasture and range (38) 

 Southern naiad, Najas flexilis - Submersed weeds (46, 47) 

 Sowthistle, Sonchus arvensis - See broadleaved perennials (40) 

 Spatterdock, Nuphar spp. - Emergent and marginal weeds (48) 

 Spikerush, Eleocharis spp. - Emergent and marginal weeds (48) 

 Sunflower, Helianthus annuu s - Small grains (20) 

 Tansy-ragwort, Senecio jacobaea - Pasture and range (37) 

 Tarweed, Iva ciliata - Legume seedlings (34), pastures (36) 

 Timothy, Phleum pratense - Lawns and turf (50) 

 Vetch, Vicia spp. - Small grains (20), pasture and range (37) 

 Waterhemlock, Cicuta maculata - Pasture and range (37) 

 Water-hyacinth, Eichhornia crassipes - Floating weeds (46) 

 Waterlettuce, Pistia stratiotes - Floating weeds (46) 

 Water lilies, Nuphar advena - Emergent and marginal weeds (48) 

 Waterweed, Elodea canadensis - Submersed weeds (46, 47) 

 White clover, Trifolium repens - Lawns and turf (50) 

 Whitetop, Cardaria draba - See broadleaved perennials (40) 

 Wild garlic. Allium vineale - Pastures (36), lawns and turf (50) 

 Wild oats, Avena fatua - Sugar beets (24), peas (28) 

 Wild onion, Allium canadense - Pastures (36), lawns and turf (50) 

 Wild radish, Raphanus raphanistrum - Small grains (20) 

 Woody aster, Aster parryi - Pasture and range (37) 



Yellow nutsedge, Cyperus esculentus - Irish potatoes (29), cropland (42) 

 Yellow rocket, Barbarea vulgaris - Small grains (19, 20), established legumes (35) 



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