560 



INDEX. 



Page. 



Polygonum incanum . ii. 149 

 lapathifolium . 149 



linifolium . 153 



marinvm 152 



maritimum 152 



mite 150 



orientale 146 



Pennsylvanicum, 150 



Persicaria 149 



punctatum 151 



sagittatum 148 



scandens 147 



tenue 153 



Virginiantim _ _ 151 



Poly mn i a i. 371 



Canadensis 37 1 



Uvedalia 372 



Polyotus heterophyl lus, ii. 124 



Polypodium ii- 484 



bulla fe rum 



501 



calcareum 



485 



connect ile 



484 



Dryopteris — 



485 



fragile 



501 



hexagonoplerum 



485 



license 



500 



marginale 



495 



Phegopteris . . 



484 



Thelypteris 



497 



Virginiantim - 



484 



vulgare 



484 



Polypody.. ii. 484 



Polypogon glomeratns, ii. 537 



racemosus 437 



setosus 437 



Polystichum acroslichoides, 



ii. 437 



POME.E i. 220 



Pond Dogwood i 313 



Pondweed i. 253 



Pondweed Tribe i. 249 



PONTEDEIUA ii. 312 



angusb folia 312 



cordata 312 



mucronata 312 



Paje 



PONTEDERIACEiE,ii.31 1 



Poor Robot's Plantain, i. 354 



Poplar ii. 213 



Poppy Tribe i. 43 



Populus ii. 213 



balsamifera 216 



he.tvdafol.ia 216 



candicans 217 



grandidentata. . 214 



heterophylla . . 215 



Hudsonica 216 



monilifeia 215 



nigra 216 



tremuloidcs 214 



trepida 214 



Porcelia triloba i. 30 



Portulaca i. 109 



oleracea 109 



PORTULACACE^, i. 108 



POTAMOGETON ii. 253 



acutifolium 256 



compressum 256 



diversifolium. . 255 



exstipulatum . . 257 



fluitans 254 



gramineum 257 



heterophyllus. . 254 



heteropliyllum . 255 



hybridus 255 



lucens 255 



marinum 257 



natans . 253 



pauciflorus 257 



pectinatus 257 



perfoliatus 256 



porcalum 255 



Proteus 254, 255 



pusillus 256 



Robbinsii 256 



rvfescens 254 



zosterifolia 258 



Potentilla i. 207 



Anserina 210 



argontea 209 



anruta 209 



Page. 



Potentilla Canadensis . i. 208 



Comarum 211 



confer tifior a . . 209 



floribunda 210 



fruticosa 210 



Norvegica 207 



paluslris 211 



Peimsyl catiica, 209 



pumila 208 



sarmentosa 208 



simplex 208 



tridentata 207 



Pothos falidus ii. 243 



Prasitium purpureum, ii. 76 



Prenanlhes i. 415 



alba 415, 416 



elba, (3. nana . 417 



altissima 416 



cordata 416 



delloidea 416 



rubicunda 415, 416 



Serpentaria 415 



suavis 415 



Prickly Ash i. 132 



Prickly Pear i. 245 



Prim ii 127 



Primrose ii. 7 



Primrose Tribe ii. 7 



Primula ii. 7 



Hornemantiia . 8 



Mistassinica 7 



pusilla 8 



slricla 8 



PRIMULACEiE ii. 7 



Piince's-feather ii. 146 



Prince's-pine i. 455 



Prinos.. ii. 3 



ambiguus 2 



glaber 4 



Gronovii 3 



lsevigatus 4 



verticillatus 3 



Privet ii. 127 



Prosartes ii. 321 



lanuginosa 321 



