262 



INDEX 



Page 



Carrot 7, 10, 54, 80, 85, 116. 125 



Cultivated 115. 207 



Family 205-207 



Small 207 



Wild . 21, 31, 33, 34. 58, 59, 67, 



68, 100, 207, f. 208 



Eradication 100 



Carum carui 68, 206 



CARYOPHYLLACEAE 136, 173-176 



Caryopsis 133 



Cashew Family 198 



Cassia Chamaecrista 28, 72, 188 



marilandica 73, 188 



nictitans 188 



occidentalis 73, 80, 188 



Tora 188 



Castor-oil Bean Seed f. 131 



Catchfly 29, 30, 68 



Evening 86, 175, f. 175 



Night-flowering 23, 33, 58, 176 



Sleepy 175 



Cates, J. S 106 



Catkin f. 124, 125 



Catnip 28, 30, 219 



Cat's ear 61, 62 



Long-rooted 251, f. 251 



Cat-tail f. 125 



Caulicle 134 



Cedar 129 



Red f. 14 



Celandine 58, 179 



Celery 54, 69, 80 



Cenchrus tribuloidcs 73, 143-144 



Centaurea 



Calcitrapa 250 



Cyanus 68, 81, 250 



Jacea 250 



nigra 250 



solstitialis 250 



Distribution .77, f. 79 



Century Plant 118 



Cerastium 



nutans 174 



viscosum 174 



Chalaza 130 



Chamomile 69 



Corn 243-244 



Garden 244 



Wild 69 



Charlock 76, 81, 94 



English . . 181-182 



Cheat 152 



Cheeses 58, 62, 69, 115, 201 



Chelidonium majus 172 



CHENOPODIACEAE ..136,167-179 

 Chenopodium 



album 28, 33, 70, 169, f. 169 



Germination 42 



ambrosioides 71, 80, 168 



Fremontii 59, 70, 168 



hybridum 70 



Cherry 15 



Choke 63 



Wild Black 64 



Chess f. 23, 58, 69, 115, 152 



Germination . , 42 



Soft . . .153 



Page 

 Chestnut, Horse. . .64, 117, f. 119, 120 



Chicken Corn 58, 69 



Chickweed 7, 24, 58, 62, 69, 132. 



174-175, f. 174 



Eradication 101 



Mouse 174 



Mouse-ear 174 



Chicory. . .5, 16, 33, 58, 69, 82, 86, 251 



Chilean Dodder 213 



Chili, Weeds of 81 



China, Weeds of 81 



Chinquapin, Water 15 



Chondrilla 69 



juncea 69, 25 1 



Choke Cherry 63 



Chrysanthemum Leucanthemum 



52, 72, 244, f. 244 



Cichorium Intybus 33, 69, 251 



Cicuta 



bulbifera 206, f . 207 



maculata 54, 69, 205-206, f. 206 



vagans 55 



Ciliate, Elder 70 



Cinquefoil 30 



Showy 186 



Silvery 



Germination 40 



Cirsium 



arvense 28, 74, 248-250, f. 249 



Iowa law 43 



canescens 59, 74, 247 



discolor 10, 28, 30, 247-248 



iowense 52 



lanceolatum 



28, 33, 52, 74, 246-247, f. 248 



Germination 42 



Nelsoni 74 



scariosum 57, 74 



Cissus 69 



Clapper, Lyle 12 



Clarkia elegans 204 



Cleistogamous flowers 15 



Cleome 59 



integrifolia 68 



serrulata 184-185, f. 185 



Clotbur 236 



Clover . . .61, 93, 120, 125, f. 126, 128 



Alsike 29, 30, 33 



Impurities in seed 35, f. 35 



Bur 59, 69. 78, 80, 115, 190 



Germination 42 



Crimson 63 



Dodder 15,28, 56,69, 116,213, f. 213 



Hop 69 



Hop, low 189 



June 47 



Pea-vine 47 



Red f. 25, 29, 31, f. 35 



Germination 42 



Impurities in seed .... 33-34, f. 34 



Medium 47 



Small 47 



Sapling 47 



Sprays injurious to 101, 102 



Sweet, White 5, 6. 24, 25, 26, 28, 



31, 55, 56, 58, 59, 74, 115, 189 

 As a forage plant 55 



