's-bill, 64, 65

Crassulaceae, 48

Creeping Cedar, 1

Creeping Wahoo, 69

Crepis, 117

Cress, 43-47

Cress, Bitter, 45, 47

Cress, Field, 46

Cress, Garden, 45, 46

Cress, Lake, 45, 46

Cress, Mouse-ear, 47

Cress, Penny, 46

Cress, Rock, 46, 47

Cress, Water, 45

Cress, Winter, 44

Cress, Yellow, 43

Crotalaria, 59

Crowberry, 68

Crowberry Family, 68

Crowfoot, 35

Crowfoot, Cursed, 37

Crowfoot Family, 35

Crowfoot, Sea-side, 36

Crowfoot, Small-flowered, 36

Crowfoot, Water, 35, 37

Cruciferae, 42

Cryptotaenia, 82

Cuckoo Flower, 45

Cucurbitaceae, 112

Cudweed, 120, 121

Culver's Root, 104

Cup Plant, 123

Currant, 49, 50

Currant, Indian, 110

Cursed Crowfoot, 37

Cuscuta, 92

Custard Apple Family, 40

Cut-grass, 5

Cycloloma, 29

Cynanchum, 90

Cynoglossum, 93, 94

Cynthia, 115

Cyperaceae, 7

Cyperus, 8

Cypress Spurge, 67

Cypripedium, 18

Dactylis, 6

Daisy, Ox-eye, 131

Dalibarda, 56

Dame's Rocket, 47

Dandelion, 115

Dandelion, Dwarf, 115

Datura, 100

Daucus, 82

Day-flower, 9

Day Lily, 11

Dead Nettle, 99

Decodon, 77

Deerberry, 86

Dentaria, 44

Deptford Pink, 34

Desmodium, 62, 63

Devil's Club, 80

Dewberry, 53

Dianthera, 107

Dianthus, 34

Dicentra, 41

Diervilla, 110

Digitaria, 5

Dioscorea, 14

Dioscoreaceae, 14

Diplotaxis, 42, 43

Dipsacaceae, 112

Dipsacus, 112

Dirca, 77

Ditch Stonecrop, 49

Dock, 26

Dock, Prairie, 122

Dodder, 92

Dodecatheon, 87

Dogbane, 90

Dogbane Family, 90

Dog Fennel, 130

Dog Rose, 52

Dog's-tooth Violet, 12

Dog Violet, 76

Dogwood, 83, 84

Dogwood Family, 83

Downy Mint, 78

Draba, 42, 46

Dracocephalum, 96

Dragon Head, 96

Dragon Head, False, 99

Dragon Root, 8

Drop-seed, 5

Drosera, 48

Droseraceae, 48

Duckweed, 9

Duckweed Family, 9

Dulichium, 7

Dutchman's Breeches, 41

Dwarf Birch, 22

Dwarf Dandelion, 115

Dwarf Dogwood, 83

Dwarf Ginseng, 80

Dwarf Iris, 15

Dwarf Mistletoe, 25

Dwarf Raspberry, 53

Dwarf Water Plantain, 3

Dwarf White Trillium, 12

Dyer's Greenweed, 58

Echinochloa, 5

Echinocystis, 112

Echinodorus, 3

Echinops, 117

Echium, 94

Eel Grass, 3

Elaeagnaceae, 77

Elatinaceae, 74

Elatine, 74

Elder, 109

Elder, Box, 70

Elder, Marsh, 114

Elecampane, 127

Eleocharis, 7

Eleusine, 6

Elm, 24

Elodea, 3

Elymus, 6