m, 93

Hyoscyamus, 101

Hypericaceae, 73

Hypericum, 73, 74

Hypoxis, 14

Hyssop, 98

Hyssop, Hedge, 104

Hyssopus, 98

Ilex, 69

Illecebraceae, 31

Ilysanthes, 104

Impatiens, 71

Imperatoria, 82

Indian Cucumber-root, 13

Indian Currant, 110

Indian Hemp, 90

Indian Mustard, 44

Indian Pipe, 84

Indian Plantain, 122

Indian Tobacco, 113

Indian Turnip, 8

Indigo, Wild, 61

Inula, 127

Ipomoea, 92

Iridaceae, 15

Iris, 15

Iris Family, 15

Ironweed, 122

Ironweed, Yellow, 128

Ironwood, 22

Isopyrum, 39

Iva, 114

Jack Pine, 1

Jeffersonia, 40

Jerusalem Artichoke, 129

Jerusalem Oak, 29

Jimson Weed, 100

Joe-Pye Weed, 122

Jointweed, 27

Juglandaceae, 21

Juglans, 21

Juncaceae, 10

Juncaginaceae, 3

Juncus, 10

Juneberry, 55

Juniper, 1

Juniperus, 1

Kalmia, 85

Kenilworth Ivy, 103

Kentucky Coffee-tree, 58

King-nut Hickory, 21

Knapweed, 121

Knawel, 31

Knotweed, 26, 27

Knotwort Family, 31

Kochia, 28

Koeleria, 6

Krigia, 115

Kuhnia, 122

Labiatae, 95

Labrador Tea, 85

Lactuca, 115, 116

Ladies' Tresses, 16

Lady's Slipper, 18

Lake Cress, 45, 46

Lamb's Quarters, 29

Lamium, 99

Laportea, 24

Lappula, 94

Lapsana, 115

Large-toothed Aspen, 19

Larix, 1

Larkspur, 36

Lathyrus, 59

Lauraceae, 41

Laurel Family, 41

Lead Plant, 58

Leafcup, 123

Leatherleaf, 86

Leatherwood, 77

Lechea, 74, 75

Ledum, 85

Leek, Wild, 13

Leersia, 5

Leguminosae, 58

Lemna, 9

Lemnaceae, 9

Lentibulariaceae, 105

Leontodon, 115

Leonurus, 98

Lepachys, 128

Lepidium, 45, 46

Lespedeza, 61, 63

Lettuce, 115, 116

Lettuce, Wild, 115, 116

Liatris, 121

Lilac, 88

Liliaceae, 10

Lilium, 12

Lily, 12

Lily Family, 10

Lily of the Valley, Wild, 12

Lily, Pond, 35

Lily, Water, 35

Limnanthaceae, 68

Limosella, 103

Linaceae, 63

Linaria, 102, 103

Linden Family, 72

Linnaea, 109

Linum, 63

Liparis, 17

Lippia, 99

Liriodendron, 40

Listera, 17

Lithospermum, 94

Live-for-ever, 49

Lizard's Tail, 19

Lobelia, 113

Lobeliaceae, 113

Lobelia Family, 113

Locust, 58

Locust, Honey, 58

Lombardy Poplar, 19

Long-spurred Violet, 76

Lonicera, 110

Loosestrife, 77, 87, 88

Loosestrife, False, 78

Loosestrife Family, 77

Lopseed, 107

Lopseed Family, 107

Loranthaceae, 25

Lotus, 35

Lousewort, 102

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