arrion-flower, 11

Carrot, Wild, 82

Carum, 83

Carya, 21

Caryophyllaceae, 31

Cashew Family, 68

Cassia, 60

Castalia, 35

Castanea, 22

Castilleja, 102

Catchfly, 33, 34

Catnip, 98

Cat-tail, 2

Cat-tail Family, 2

Caulophyllum, 40

Ceanothus, 71

Cedar, 1

Celandine, 41

Celandine Poppy, 41

Celastraceae, 69

Celastrus, 69

Celtis, 24

Cenchrus, 5

Centaurea, 121

Centaurium, 89

Centaury, 89

Cephalanthus, 108

Cerastium, 33

Ceratophyllaceae, 34

Ceratophyllum, 34

Cercis, 58

Chaerophyllum, 83

Chamaedaphne, 86

Chamaelirium, 13

Charlock, 44

Cheat, 7

Chelidonium, 41

Chelone, 104

Chenopodiaceae, 28

Chenopodium, 28, 29

Cherry, 54

Cherry, Ground, 101

Chervil, 83

Chestnut, 22

Chickweed, 32, 33

Chickweed, Mouse-ear, 33

Chicory, 115

Chimaphila, 85

Chiogenes, 85

Chives, Wild, 13

Chokeberry, 55

Choke Cherry, 54

Chrysanthemum, 121, 130, 131

Chrysosplenium, 50

Cichorium, 115

Cicuta, 82

Cimicifuga, 39

Cinquefoil, 52, 56, 57

Circaea, 78

Cirsium, 117, 118

Cistaceae, 74

Cladium, 8

Clammy Locust, 58

Clammy-weed, 47

Claytonia, 34

Clearweed, 24

Cleft Phlox, 92

Clematis, 35

Climbing Fumitory, 41

Climbing Rose, 52

Clintonia, 13

Clover, 61

Clover, Bush, 61, 63

Clover, Hop, 60

Clover, Prairie, 60

Clover, Sweet, 61

Cocklebur, 114

Cockle, Corn, 33

Coffee-tree, 58

Cohosh, Blue, 40

Colic-root, 13

Collinsia, 104

Collinsonia, 95

Coltsfoot, 122, 130

Columbine, 36

Comandra, 24

Comfrey, 93, 94

Commelina, 9

Commelinaceae, 9

Common Blue Violet, 76

Common Cat-tail, 2

Common Vetch, 59

Compass Plant, 127

Compositae, 113

Composite Family, 113

Coneflower, Gray-headed, 128

Coneflower, Purple, 131

Conioselinum, 83

Conium, 83

Conopholis, 106

Conringia, 42

Convolvulaceae, 91

Convolvulus, 91, 92

Coptis, 39

Corallorhiza, 16

Coral Root, 16

Coreopsis, 123, 124

Corispermum, 28

Cork Elm, 24

Cornaceae, 83

Corn Cockle, 33

Corn Flower, 121

Corn Gromwell, 94

Corn Salad, 111

Cornus, 83, 84

Corydalis, 42

Corylus, 22

Costmary, 121

Cotton Grass, 8

Cotton Thistle, 118

Cottonwood, 19

Cowbane, 81

Cowherb, 34

Cow Parsnip, 82

Cowslip, 36

Cow Wheat, 104

Crab, 54

Crab Grass, 5

Crack Willow, 20

Cranberry, 85

Cranberry Tree, 111

Crane-fly Orchis, 16

Crane