Index to Orders and Genera. 



PAGE 



Pentstenion 105 



Phacelia 1()0 



Phlox 'JS 



Phoradendron 37 



Physiocarpus til 



Pimpitiella ^>« 



Pinus 17 



Platanacese (iO 



Platamis CO 



Plantaginacere 110 



Plantago 110 



Podophyllutn 4S 



Pogonia 27 



Polemoniaceae 98 



Polenioniiim 98 



Polygala 74 



PoU'galaceiE 74 



Polygonacete S7 



Polygonatum 22 



Populus 29 



Portulaca 38 



PortulacaceEe 38 



Potentilla 65 



Priiiiulaceae 95 



Prunella 104 



Pruiius (58 



Ptelea 73 



Pyrus 62 



Quercus 33 



RaminculacesE 42 



Ramuiciilus 46 



Khaninacese 79 



Rhainiuis 79 



Rhododendron 91 



Rhus 75 



Ribes 59 



Robinia 71 



Roripa 53 



Rosa 67 



Rosacese 60 



Rubiaceie Ill 



Rubus 64 



Rudbeckia 119 



Rnellia 110 



Rumex 37 



PAGE 



Rutacese 73 



Salicaceae 29 



Salix 30 



Salvia lO:! 



Sambuciis 114 



Sanguinaria 50 



Sanicula 87 



Santalacete 37 



Sassafras 49 



Saxifraga 58 



Saxifragacese 57 



SchoUera 94 



Scrophulariaceae 105 



Scutellaria 103, 



5 xjot-vt-.,.^ j> / 



Senecio 120 



Shepherdia 85 



Silene 38 



Siniarubacese 73 



Sisymbrium 52 



Sisyritichiuni 25 



Smilaceie 24 



Smilacina 22 



Smilax 24 



Solanaceae 104 



Solanum 105 



Solea 84 



Sorbus 62 



Spathyema 18 



Specularia 118 



Spergula 40 



Spiraea 61 



Staphylea 77 



StaphyleacecC 77 



Stellaria 39 



Stenophragnia 56 



Streptopus 22 



Stylophorum 50 



Sullivantia 58 



Symphoricarpus 115 



Symplocarpus 18 



Synandra 104 



Syndesnion 45 



Syringa 96 



Taxus 18 



Taraxacum 121 



PAGE 



Tecoma 109 



Thalesia 108 



Thaliclrum 48 



Thaspium 87 



Thelypodium 53 



Thuya 18 



Thymelaeaceae 85 



Tiarella 58 



Tilia 81 



Tiliacese 80 



Tissa 40 



Toxylon 36 



Tradescautia 19 



Trautvetteria 4() 



Trientalis 95 



Trifolium 70 



Trillium 2:^ 



Triosteum 115 



Trollius 43 



Tsuga IS 



Tussilago 120 



Ulmaceie 35 



Uhnaria 67 



Ulmus 35 



Umbelliferee 86 



Unifolium 22 



Utricularia 108 



Uvularia 20 



Vaccinium 93 



Vagnera 22 



Valeriana 117 



Valerianacece 117 



Valerianella 117 



Veronica 106 



Viburnum 114 



Vicia 71 



Vinca 97 



Viola 82 



Violaee^e 82 



VitacesE 79 



Vitis 80 



Waldsteinia 66 



Wistaria 71 



Xanthoxylum 73 



Zizia 88 



