94 



INDEX. 



Pinweed 8 Raphanus 7 



Pitcher-Plant 5 Raspberry 18 



Plantaginacea 50 Rattlesnake- Plan tain 62 



Plantago 50 Red-top 78, 80 



Plantain 32, 50 Rhododendron "... 38 



Plantanacea 55 Rhodora 39 



Plantanus 55 Rhus 14 



Poa So Rhynchospora 72 



Podophyllum 4 Ribes 22 



Pogonia 63 Rice 78 



Pokeweed 51 Robinia 15 



Polanisia 7 Rock-Cress 6 



Polevtoniacece 42 Rock-rose 8 



Polemonium 42 Rosa 20 



Polygala 14 Rosacea; 17 



Potygalacece 14 Rose 20 



Polygonacece 51 Rubiacecp 28 



Polygonatum 65 Rubus 18 



Polygonum 52 Rudbeckia 33 



Polymnia 32 Rue i 



Polypodium 82 Rue-anemone i 



Polypody 82 Rumex 51 



Pond-Lily 4 Rush 68, 82 



Pontederia 68 Rutacece 12 



Pontederiacea 68 Rye 81 



Poplar 60 



Populus 59 Sagittaria 70 



Portulaca 10 SalicacetP 58 



Portulacacecr 10 Salix 58 



Potamogeton 70 Sambucus 27 



Potentilla 19 Sandwort 9 



Prenanthes 35 Sanguinaria 5 



Primrose 23 Sanicula 26 



Primulacea 40 Safindacece 13 



Prince's Feather 52 Santalacece 54 



Prunus 17 Saponaria 9 



Pteris 82 Sarracenia 5 



Purslane 10 Sarraceniacece 5 



Pycnanthemum 48 Sarsaparilla 26 



Pyrola 39 Sassafras 53 



Pyrus .... 20 Saxifraga 21 



Saxifragacea' 21 



Quercus 58 Saxifrage 21 



Quillwort 85 Scheuchzeria 70 



Scleranthus 50 



Radish 7 Scirpus 71 



Ragweed 33 Scleria 72 



Rhamnacece 13 Scrophularia 44 



Ranunculacete i Scrophulariaceaf 44 



Ranunculus i Scrub-Oak 58 



