Ill 



Myrica, 32 

 Myricace.e, 32 

 Myriophyllum, 6-1 

 Nabalus, 89 

 Naiadace^, 7 

 Naias, 7 

 Nardia, 63 

 Nasturtium, 46 

 Naumbergia, 69 

 Negundo, 59 

 Nemopanthus, 58 

 Nepeta, 75 

 Nettle, 35 



Dead, 74 



Hedge, 75 



Hemp, 73 

 Nicandra, 76 

 Nightshade, 76 



Enchanter's, 63 

 Nuphar, 40 

 Nymphgea, 40, 41 

 NymphyEace^, 40 

 Nyssa, 66 

 Oak, 34 

 Oakesia, 28 

 Oat-grass, 10 

 (Enothera, 63 

 Oleace^, 70 

 Onagra, 63 

 Onagrace^, 63 

 Onion, 27 

 Onoclea, 3 

 Onopordon, 89 



OpHIOGLOSSACEvE, 1 



Ophioglossum, 1 

 Orchid, 30 

 Orchidace^, 29 

 Orchis, 31 

 Origanum, 75 

 Orobanchace-e, 79 

 Orobanche, 79 

 Oryzopsis, 14 

 Osmorrhiza, 65 

 Osmunda, 3 

 Ostrya, 34 

 Oxalis, 56 

 Oxycoccus, 68 

 Panax, 64 

 Panicularia, 13 

 Panicum, 14, 104 

 Pansy, 62 

 Papaverace^, 44 

 Parietaria, 35 

 Parnassia, 48 

 Parsnip, 65, 66 

 Partridge-berry, 80 

 Paspalum, 15 

 Pastinaca, 65 

 Pea, Beach, 55 

 Pedicularis, 78 



Pelkea, 3 

 Peltandra, 25 

 Pennyroyal, 73 

 Penthorum, 48 

 Pentstemon, 78 

 Peppergrass, 46 

 Peppermint, 74 

 Pepper-root, 46 

 Peramium, 30 

 Periwinkle, 71 

 Petasites, 89 

 Phalaris, 15 

 Phegopteris, 3 

 Philotria, 9 

 Phleum, 15 

 Phlox. 72 

 Phragmites, 15 

 Phryma, 73 

 Physalis, 76 

 Physalodes, 76 

 Physostegia, 75 

 Phytolacca, 38 

 Phytolaccace.e, 38 

 Picea, 5 



Pickerel-weed, 26 

 Picris, 89 

 Pignut. 31 

 Pigweed, 37 

 Pilea, 35 

 Pimpinella, 65 

 Pine, 6 



Prince's, 67 

 Pinguicula, 78 

 Pink, 39 



Swamp, 68. 

 Pinus, 6 

 Pinweed, 61 

 Pipsissewa, 67 

 Pitcher-plant, 47 

 Plantaginace.e, 79 

 Plantago, 79 

 Plantain, 79 



Rattlesnake, .30 

 Platanace.e, 49 

 Platanus, 49 

 Plum, 51 

 Poa, 15 



Podophyllum, 43 

 Pogonia, 31 

 Poke, Indian, 28 

 Poke weed, 38 

 Polanisia, 47 

 Polemoniace.e, 72 

 Polemonium, 72 

 Polygala, 57 



POLYGALACE.E, 57 

 POLYGONACE.E, .36 



Polygonatum, 28 

 Polygonum, 36, 106 

 Polymnia, 89 



Polypodium, 3 

 Pond weed, 7 

 Pontederia, 26 

 Pontederiace^e, 26 

 Poplar, 32 

 Populus, 32 

 Portulaca, 39 



PoRTULACACE.Ii, 38 



Potamogeton, 7 

 Potentilla, 50 

 Poterium, 51 

 Prenanthes, 89 

 Primrose, Evening, 63 

 Primula, 69 

 Primulace.e, 69 

 Prince's-feather, 37 

 Proserpinaca, 64 

 Prunella, 75 

 Prunus, 51 

 Pteridophyta, 1 

 Pteris, 3 

 Pterospora, 67 

 Purslane, 39 

 Pycnanthemum, 75 

 Pyrola, 68 

 Pyrus, 51 

 Quack-grass, 9 

 Quercus, 34 

 Radish, 47 

 Ragweed, 83 

 Ragwort, 89 

 Ramshead, 29 

 Ranunculace^c, 41 

 Ranunculus, 42 

 Raphanus, 47 

 Raspberry, 52 

 Rattlebox, 54 

 Rattlesnake-root, 80 

 Razoumofskya, 36 

 Red-top, 9 

 Rhamnace.e, 59 

 Rhamnus, 59 

 Rhexia, 63 

 Rhododendron, 68 

 Rhus, 58 



Rhynchospora, 24 

 Ribes, 48 

 Robinia, 55 

 Rocket, 46 

 Roripa, 46 

 Rosa (Rose), 52 



ROSACE.E, 49 



Rose, Rock, 61 

 Rubiace^t;, 80 

 Rubus, 52 

 Rudbeckia, 89 

 Rue, 57 



Meadow, 43 

 Rumex, 37 

 Rush, 26 



