478 



Paci. 



(Pastinaca) iriquinata . . 277 



Pat ridge-berry 314, 433 



PatridgePea 190 



Pear ..- - 223 



Pearhvort 93 



Pencil-flower 174 



Penny Cress 64 



Peplis 91 



Americana 91 



Pepper-root 58 



Peppcrwort 64 



Penthortm 253 



sedoides 253 



Pemettya 451 



Phaca 173 



neglecta 173 



Phalaehroloma 355 



oblusifolium 355 



Phalerocarpus 450 



serpyllifolia 450 



Phaseolvs 160 



diversifolius 160 



helvolus 161 



macrostachyos 160 



paniculatus 1 60 



peduncularis 161 



perennis 160 



vexillatus 161 



Physocarpus 198 



Picrococcus 446 



Pink Tribe 92 



Pinweed 78 



Pipsissewa 455 



Pimm 157 



maritimum 157 



Pityopsis 367 



falcata 367 



Ploughman's Spikenard . 368 



Pluchea 369 



camphorata 369 



Marilandica 370 



Podalyria 187 



iincloria 187 



POBOPHTLLUM 35 



peltatum 35 



INDEX. 



Piot. 



Poison Elder 130 



Poison Hemlock 282 



Poison Sumach 130 



POLANISIA 67 



graveolens 67 



POLYOALA 149 



ambigua 151 



brevifolia 150 



cruciala 150 



cuspidata 150 



paucifolia 152 



polygama 152 



purpurea .. 150, 152 



rubella 152 



sangTiinea 149 



Senega 151 



unifiora 132 



verticillata 150 



POLYGALACE^ ... 149 



POLYMNIA 371 



Canadensis 371 



Uvedalia.. 372 



POME^.-- 220 



Pond Dogwood ... 313 



Poor Robert's Plantain . . 354 



Poppy Tribe 43 



Porcelia 30 



triloba 30 



PORTULACA 109 



oleracea 109 



PORTULACACE^ . . 108 



POTENTILLA 207 



Anserina 210 



argentea 209 



arguta 209 



Canadensis 208 



Comarum . . 211 



confertifiora 209 



Jl/)ribunda 210 



fruticosa 210 



Norvegica 207 



palustris 211 



PennsT/lvanica . . 209 



pumila 208 



Earmentosa 208 



Face. 



(Potcntilla) nmpJez 208 



tridentata 207 



Prenanthes 415 



alba 415, 416 



alba, (3. nana 417 



altissima 416 



cordata 416 



deltoidea 416 



rubicunda.. 415, 416 



Serpentaria 415 



suavis 415 



Prickly Ash 132 



Prickly Pear-. 245 



Prince' s-pine 455 



Proserpinaca 240 



palustris 241 



pectinacea 241 



Prunus 194 



acuminata 195 



borealis 196 



depressa 195 



lanceolata 196 



littoralis 194 



maritima 194 



obovata 196 



Pennsylvanica . . 196 



pubescens 194 



pygmaa 195 



rubra 196 



serotina 196, 197 



spharocarpa 194 



Susquehanna 195 



Virginiana, 196, 197 



Ptelea 133 



trifoliata 133 



Pterospora 458 



Andromedea 458 



Purple Avens 203 



Purple Loosestrife 229 



Purselane 109 



Purselane Tribe 1 08 



Pyrola 451 



asarifolia 452 



chlorantha 453 



elliptica 452 



