43. Morning-glory, annual, Ipomoea purpurea - Corn (17), cotton (20), 



soybeans (21), peanuts (21) 



44. Mustard, Brassica kaber - Small grains (18), flax (19), legume seed- 



lings (31) 



45. Nimblewill, Muhlenbergia schreberi - Lawns and turf (45) 



46. Oaks, Quercus spp. - Pastures and range (34) 



47. Orchardgrass, Dactylis glomerata - Lawns and turf (45) 



48. Paragrass, Panicum purpuras cens - Ditchbank weeds (40) 



49. Parrotfeather, Myriophyllum proserpinacoides - Submersed weeds (42) 



50. Pennycress, Thlaspi arvense - Flax (19) 



51. Pickerelweed, Pontederia spp. - Emergent and marginal weeds (42) 



52. Pigweed, Amaranthus spp. - Corn (17), small grains (18), flax (19), 



cotton (20), soybeans (21), peanuts (21;, rish potatoes (27), legume 

 seedlings (31), pastures (33) 



53. Plantain, Plantago spp. -Small grains (19), lawns and turf (44,45,46) 



54. Pondweeds, Potamogeton spp. - Submersed weeds (41,42) 



55. Prickly lettuce, Lactuca serriola - Small grains (19) 



56. Princes plume, Polygonum orientale - Pasture and range (34) 



57. Purslane, Portulaca oleracea - Lettuce (26), onions (26) 



58. Quackgrass, Agropyron repens - Perennial grasses, rushes, ana sedges 



(38), ditchbank weeds (40), lawns and turf (45) 

 59- Ragweed, Ambrosia spp, - Corn (17), small grains (18), flax (19), 

 beans (24), legume seedlings (31), pastures (33), see also, broad- 

 leaved perennials (37) 



60. Red sorrel, Rumex acetosella - Lawns and turf (44) 



61. Reed grass, Phragmites communis - Ditchbank weeds (40) 



62. Russian knapweed, Centaurea repens - See broadleaved perennials ( 37) 



63. Russian-thistle, Salsola kali - Flax (20) 



64. Sand sagebrush, Artemisia filifolia - Pasture and range (34) 



65. Shepherds -purse, Capsella bursa-pastoris - Small grains (19) 



66. Silvery lupine, Lupinus spp. - Pasture and range (34) 



67. Smartweed, Polygonum pensylvanicum - Corn (17), small grains (18), 



beans (24), onions (26), emergent and marginal weeds (42) 



68. Sneezeweed, Helenium nudiflorum - Legume seedlings (31), pastures 



(33), pasture and range (34) 



69. Southern naiad, Najas flexilis - Submersed weeds (41,42) 



70. Sowthistle, Sonchus arvensis - See broadleaved perennials (37) 



71. Spatterdock, Nuphar spp. - Emergent and marginal weeds (42) 



72. Spikerush, Eleocharis palustris - Emergent and marginal weeds (42) 



73. Sunflower, Helianthus annuus - Small grains (19) 



74. Tansy-ragwort, Senecio jacobea - Pasture and range (34) 



75. Tarweed, Iva ciliata - Legume seedlings (31), pastures (33) 



76. Timothy, Phleum pratense - Lawns and turf (45) 



77. Vetch, Vicia spp. - Small grains (18), pasture and range (34) 



78. Waterhemlock, Cicuta maculata - Pasture and range (34) 

 79- Water-hyacinth, Eichhornia crassipes - Floating weeds (41) 



80. Waterlettuce, Pistia stratiotes - Floating weeds (41) 



81. Water lilies, Nuphar advena - Emergent and marginal weeds (42) 



82. Waterweed, Elodea canadensis - Submersed weeds (41,42) 



83. White clover, Trifolium repens - Lawns and turf (44) 



84. Whitetop, Cardaria draba - See broadleaved perennials (37) 



85. Wild garlic, Allium vineale - Pastures (33), lawns and turf (44,45) 



86. Wild oats, Avena fatua - Sugar beets (22), peas (27) 



87. Wild onion, Allium canadense - Pastures (33), lawns and turf (44,45) 



88. Wild radish, Raphanus raphanistrum - Small grains (18) 



89. Woody aster, Aster spp. - Pasture and range (34) 



90. Yellow-rocket, Barbarea vulgaris -Small grains (18), established 



legumes (32) 



- 55 - 



