272 



INDEX 



Page 

 Mustard, Worm-seed Eradication 95 



Myagrum sativum 81 



Myosurus minimus. Germination 



of 40 



Napiform root 116 



Narrow-leaved 



Sneezeweed ...53, 59, 73, 77, 242 



Verbena 217-218 



Nasturtium officinale 69 



Navarretia squarrosa 214 



Nebraska weeds 68-75 



Needle Grass 18, 64, 72, 146 



Nelson, Aven 67 



Nelson's Thistle 115 



Nelumbo 15 



Nepela 



Cataria 28, 219 



hederacea 219 



Neslia panicuiata 181 



Nettle 



Bull 193-222 



Dead 58, 59, 72-219 



Family 160-162 



Horse 7, 12, 13, 54, 67, 69, 71, 



83, 91, f. 221, 222 



Eradication 91, 109-110 



Slender 72, 115, 161, f. 161 



Small 162 



Spurge 74 



Stinging 64, 72, 161 



Vervain 75 



Western 72, 116, 162 



Wood 72 



New England 



Aster 232 



Garden weeds 58 



Nicotiana glauca 74 



Nigger-head 83, 237 



Night-flowering Catch-fly 



23, 33, 46, 58 176 



Nightshade 15 



Black 13, 16, 63, 72, f. 220 



Common 220-222, f. 220 



Family 220 



Silvery-leaved 72 



Three-flowered 72 



Nimble Will ... 33, 58, 90, 93, 1 16, 147 



Nobbe 40 



North Dakota weeds 67, 68-75 



Noxious weeds 65-75 



Tables of 68-75 



Nucellus 130 



Nursery-stock as seed-carrier .... 19 



Nut 133 



Grass 4, 28, 58, 1 16 



Northern ..72, 115, 157, f. 158 



Southern 72, 157-158 



NYCTAGINACEAE . ..136, 172-173 



Oak 119 



Oat field 4 



Grass, Legislation 48 



Oats 1, 3, 5, 23, 139 



Germination 42 



Legislation 48 



Wild 18, 19, 31, 57, 58, 64, 67, 



72, 88, 149-150 



Page 



Oats, Germination 38 



Oenothera 204 



biennis 73, 82. 205. f. 205 



Vitality 38 



Ohio weeds 68-75 



Okra 201-202 



Old-witch Grass.. .28, 31, 33. 141-142 



ONAGRACEAE 136, 204-205 



Onion 117 



Wild 9, 59, 72 



Opium 64 



Orach 60, 72, 169, f. 171 



Orange 



Hawkweed 65. 72 



Eradication 95. 97 



Orchard Grass 



Impurities in 36, 46, 47 



Legislation 46, 47, 48 



Orchids 116 



Ornithogalum 



umbellatum 61, 74, 160 



Distribution . . f. 79 



OROBANCHACEAE 137, 225 



Orobanche 



minor 225 



ramosa 225 



Orthotropous ovule 131 



Orton, W. A 95, 99 



Osage Orange 64 



Oswald, E. 1 41 



Ovary 129-130 



Ovule 



Coats 130 



Morphology of 129-131 



OXALIDACEAE 191 



Oxalis 15 



corniculala 191 



stricta 191 



Yellow 10 13 



Ox-eye 236-237 



Daisy 16, 19, 24, 52, 67, 72, 82. 



244. f. 244 

 Oxybaphus 



hirsutus 173 



linearis 173 



nyctagineus 



28, 31, 70, 172-173, f. 173 



Oxytropis Lamberti 71 



Oyster 



Plant 72 



Vegetable f. 17, 59 



Pale Dock 163 



Panicle 125, f. 126 



Panicum 



capillare 28, 33, 75, 141-142 



dichotomiflorum 142 



glqbrum " 46 



miliaceum, Legislation 48 



virgatum 74 



Pansy 78, 203-204 



PAPAVERACEAE 136, 178-179 



Papilionaceous flower f. 127, 128 



Parasitic plants 116 



Parietal placenta 130 



Parietaria pennsylvanica 72 



