153 



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 1 1 



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 



Pycnanthemum 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 Clover 61 



Red Cedar I 



Red Currant 50 



Red Maple 7 



Red Mulberry 24 



Red Oak ' 23 



Red Raspberry 53 



Red-root 7\ 



Red Sorrel 25 



