INDEX. 



PAGE 



Ostrya 97 



Oxal'is 21 



Panax 49 



Panicularia. 132 



Panicum 127 



Papaver 9 



Parnassia 40 



Parchenocissus 25 



Pastinaca 45 



Pedicularis 82 



Pellaea 135 



Peltandra 115 



Penthorum 41 



Pentsiemon 80 



Perarnium 104 



Phalaris 128 



Phegopteris 136 



Phleum lag 



Phlox 75 



Phry ma 84 



Physalis 7Q 



Physalodes 79 



Physocarpus 33 



Pnytolacca 89 



Picea loi 



Pilea 94 



Pimpinella 46 



Pingfuicula &3 



Pinus loi 



Plantago 88 



Platanus 9S 



Poa 131 



Podophyllum 7 



Pogonia 104 



Polanisia 14 



Polemonium 76 



Poly gala 27 



Polygonatura icg 



Polygonum 90 



Polymnia 59 



Polypodium »34 



Pontederia 113 



Populus 100 



Porteranthus 33 



Poterium 37 



Portulacca 18 



Potamogeton 117 



Poteniilla 36 



Prenanthes 64 



Prunella 87 



Prunus 32 



Ptelea 22 



Pteris 134 



Pterospora 71 



Pycnantliemunt 85 



P'yrola 71 



Pyrus 37 



Ouercus 98 



Ranunculus 3 



Rajjhnus 13 



Ra/ouinofskya 92 



Rhamnus 24 



Rhododendron 70 



PAGE 



Rhodora 70 



Rhus 26 



Rhynchospora 121 



Ribes 40 



Robinia 29 



Roripa 12 



Rosa 37 



Rotala 42 



Rubus 34 



Kudbeckia 60 



Runiex 89 



Sagittaria 117 



Salix 99 



Sambucus 50 



Sanguinaria 9 



Sanguisorba 37 



Sanicula 48 



Saponaria 16 



Sarracenia 9 



Sassafras 91 



Saxifraga 39 



Scabiosa 54 



Scheuchzeria 117 



Schollera 67 



Scirpus 120 



Scrophularia 80 



Scutellaria 87 



Sedum 41 



Selaginella 141 



Senecio 62 



Sericncarpus 56 



Setaria . 128 



Sicyos 44 



Silene 16 



Sinapis 13 



Sisymbrium 13 



Sisyrinchium 107 



Sium 46 



Smilaciiia no 



Smilax 108 



Solanum 78 



Solidago • 54 



Sorbus 38 



Sparganium 114 



Spathyema 115 



Spfcuiaria 66 



Spergula 18 



Spi riea 33 



Spiranthes 104 



Spirodela 116 



Sporobolus 130 



Stachys 83 



Staphylea 26 



Steironema 72 



Stcllaria 18 



Streptopus 1 10 



Symphoricarpos 52 



Symphytum 77 



HymplocarpHS 115 



Syndesmon 2 



Tanacetuin 62 



Taraxicuin 64 



Taxus :o2 



Teucrium 85 



