Pink, Moss, 92

Pink, Mullein, 33

Pink, Rose, 89

Pin Oak, 23

Pinus, 1

Pinweed, 74, 75

Piperaceae, 19

Pipewort, 9

Pipewort Family, 9

Pitcher Plant, 48

Pitcher Plant Family, 48

Plane Tree Family, 51

Plantaginaceae, 107

Plantago, 107

Plantain, 107

Plantain Family, 107

Plantain, Indian, 122

Plantain, Mud, 10

Platanaceae, 51

Platanus, 51

Plum, 54

Poa, 7

Podophyllum, 40

Podostemaceae, 48

Podostemum, 48

Pogonia, 18

Poison Hemlock, 83

Poison Ivy, 69

Poison Sumach, 68

Pokeweed, 30

Pokeweed Family, 30

Polanisia, 47

Polemoniaceae, 92

Polemonium, 92

Polemonium Family, 92

Polygala, 65, 66

Polygalaceae, 65

Polygonatum, 11

Polygonaceae, 25

Polygonum, 26-28

Polymnia, 123

Polytaenia, 81

Pond Lily, 35

Pondweed, 2

Pondweed Family, 2

Pontederia, 10

Pontederiaceae, 10

Poplar, 19

Poppy, 41

Poppy, Celandine, 41

Poppy Family, 41

Poppy Mallow, 73

Populus, 19

Portulaca, 34

Portulacaceae, 34

Potamogeton, 2

Potentilla, 52, 55-57

Prairie Clover, 60

Prairie Dock, 122

Prairie Fringed Orchis, 19

Prairie June-grass, 6

Prairie Parsnip, 81

Prenanthes, 116

Prickly Ash, 65

Prickly Pear, 77

Primrose, 87

Primrose Family, 87

Primula, 87

Primulaceae, 87

Prince's Feather, 27

Prince's Pine, 85

Proserpinaca, 79

Prunella, 97

Prunus, 54

Psedera, 71

Ptelea, 65

Pterospora, 84

Puccoon, 94

Pulse Family, 58

Purple Avens, 57

Purple Coneflower, 131

Purple Fringed Orchis, 19

Purslane, 34

Purslane Family, 34

Purslane, Water, 78

Putty Root, 16

Pyenanthemum, 98

Pyrola, 84, 85

Pyrus, 52, 54, 55

Quack Grass, 6

Quaking Aspen, 19

Quassia Family, 65

Queen of the Prairie, 57

Quercus, 22, 23

Radicula, 43, 45, 46

Radish, 45

Radish, Horse, 46

Radish, Wild, 44, 45

Ragged Fringed Orchis, 19

Ragweed, 114

Ragwort, 127, 128

Ram's Head Lady's Slipper, 18

Ranunculaceae, 35

Ranunculus, 35-38

Raphanus, 44, 45

Raspberry, 53, 54

Rattlebox, 59

Rattlesnake Master, 80

Rattlesnake Plantain, 17

Rattlesnake Root, 116

Red Ash, 88

Redbud, 58

Red Cedar, 1

Red Clover, 61

Red Currant, 50

Red Maple, 70

Red Mulberry, 24

Red Oak, 23

Red Raspberry, 53

Red-root, 71

Red Sorrel, 25

Red-top, 6

Reed, 6

Reed Grass, 5

Rein Orchis, 18

Reseda, 48

Resedaceae, 48

Rhamnaceae, 71