152 



Oxalis , 64 



Ox-eye 123 



Ox-eye Daisy 131 



Oxybaphus 31 



Oxypolis 81 



Painted Cup 102 



Painted Trillium 12 



Pale Violet 76 



Panax 80 



Panic-grass 5 



Panicum 5 



Pansy 76 



Papaveraceae 41 



Papaver 41 



Papaw 40 



Paper Birch 21 



Parietaria 24 



Parnassia 50 



Parsley Family 80 



Parsley, .Hemlock 83 



Parsnip, Cow 82 



Parsnip, Meadow 81 



Parsnip, Prairie 81 



Parsnip, Water 81 



Parsnip, Wild 81 



Partridge Berry 108 



Partridge Pea 60 



Pasque Flower 38 



Pastinaca 81 



Patience Dock 26 



Pea v 59 



Peach-leaved Willow 20 



Pear 54 



Pear, Prickly 77 



Pearlwort 32 



Pearly Everlasting 120 



Pedicularis 102 



Pellitory 24 



Peltandra 9 



Penny Cress 46 



Pennyroyal 95 



Pennywort, Water 80 



Penthorum 49 



Pentstemon 104 



Pepper Family 19 



Pepper Grass 46 



Peppermint 98 



Perfumed Cherry 54 



Periwinkle 90 



Petalostemum 60 



Petasites 130 



Petunia 101 



Phacelia 93 



Phleum 4 



Phlox 92 



Phragmites 6 



Phryma 107 



Phrymaceae 107 



Physalis 101 



Physocarpus 53 



Physostegia 99 



Phytolacca 30 



Phytolaccaceae 30 



Picea i 



Pickerel-weed 10 



Pickerel-weed Family 10 



Picris 115 



Pignut Hickory 21 



Pigweed 30 



Pilea 24 



Pimpernel 87 



Pimpernel, False 104 



Pimpernel, Water 87 



Pinaceae I 



Pin Cherry 54 



Pine ." i 



Pine Drops 84 



Pine Family I 



Pineweed 74 



Pinguicula 105 



Pink, Deptford 34 



Pink Family 31 



Pink, Fire 33 



Pink, Meadow 34 



Pink, Moss 92 



Pink, Mullein 33 



Pink, Rose 89 



Pin Oak 23 



Pinus i 



Pin weed 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 5 1 



