W4 



INDEX 



Poison Ivy 562 



Oak 552, 553 



Sumach 652 



Poke, Comriaon 374 



Milkweed 665 



Pokeweed 374 



Family 374 



Polanisia 438 



graveoleus 438 



trachysperma 438 



POLBMONIACEAE 673 



Polemonixim 676 



coeruleum 676 



Family 673 



reptans 676 



Van Bruntiae 676 



Polycodium candv- 



cans 639 



meldnocarpum 639 



neglectum 639 



stamineum 639 



Polygala 538 



ambigua 540 



brevifolia 540 



cruciata 539 



Curtissii 539 



cymosa 540 



faaligiata 539 



Fringed 538 



incarnata 539 



lutea 540 



mariana 539 



Nuttallii 539 



pauciflora 538 



polygama 539 



ramosa 540 



sanguinea 539 



Senega 539 



verticillata 540 



mrideacenB 539 



POLYGALACEAE 538 



POLYGONACEAE 353 



Polygonatum 292 



biflorum 292 



boreale 292 



commutatum 292 



cuneatum 292 



giganteum 292 



virginicum 292 



Polygonella 363 



americana 363 



articulata 363 



ericoidea 364 



Polygonum 357 



acre 361 



amphibium 360 



arifolium 362 



aviculare 358 



camporum 359 



Careyi 361 



cilinode 362 



Convolvulus 362 



cristatwm 363 



cuspidatum 363 



densiflorum 360 



DouglasU 359 



dumetorum 363 



emersum 361 



erectum 369 



exsertum 358 



Fowleri 358 



Hartwrightii 361 

 Hydropiper 36 1 

 hydropiperoidea 



362 

 incamatwm 360 

 lapathifolium 360 

 littorale 359 



longistylum 361 

 maritimtim 358 

 Muhlenbergii 361 

 opelousanum 362 

 orientale 361 



pennsylvanicum 



361 

 Persicaria 361 



portoricense 360 

 prolificum 358 



punctatum 361 

 ramosissimum 



S58, 359 

 Rayi 358 



sagittatum 362 

 scandeoa 362 



setaceum 362 



tenue 359 



tomentosum 360 

 virginianum 362 

 viviparum 359 

 Zuccarinii 363 

 Polymnia 824 



canadensis 824 

 uvedalia 824 



POLYPODIACEAE 33 



Polypodium 34 



incanuTti 34 



polypodioldes 34 



vulgare 34 



Polypody 34 



Polypogon 133 



monspeliensis 133 



Polypremum 653 



proeumbens 654 



Polypteris 843 



callosa S44 



Polystichum 40 



acrostichoides 40 



Braimii 41 



Lonchitis 40 



Polytaenia 620 



Nuttallii 620 



Pomme blanche 512 



Pommede Prairie 512 



Pond Pme 64 



Spice 414 



Pondweed 70 



Family 69 



Horn 78 



Pontederia 266 



cordata 266 



PONTEDERIACEAE 



266 

 ■Poor Man's Weather- 

 glass 647 

 Robin's Plantain 



873 



Poplar 323, 409 



Balsam 329 



Black 329 



Downy 329 



Lombardy 329 



Necklace 329 



Silver-leaved 328 



White 328 



Poppy 416 



Celandine 415 



Common 416 



Corn 416 



Family 414 



Horn 416 



Mallow 568 



Mexican 416 



Plume 416 



Prickly 436 



Sea 415 



Populus 328 



alba 328 



balsamifera 329 



candicans 329 



deltoides 329 



grandidentata 328 



heterophylla 329 



monilifera 329 



nigra 329 



tremuloides 328 



Porcupine Grass 124 



Porteranthus 457 



stipulatua 457 



Portulaca 389 



neglecta 389 



oleracea 389 



pilosa 389 



retusa 389 



PORTULACACEAE 387 



Post Oak 339 



Potamogeton 70 



acutifolius 75 



alpinus 72 



americanus 73 



amplifolius 73 



angustifoliua 74 



bupleuroides 75 



confervoides 77 



crispus 75 



dimorphus 77 



diveraifolius 77 



epihydrus 72 



Faxoni 73 



filiformis 77 



fiuitans 73 



foliosus 77 



Friesii 75 



gemmiparus 76 



heterophyllus 73 



Hillii 75 



hybridus 77 



illinoensis 73 



interior 77 



interruptus 78 



lateralis 76 



lonchites 73 



lucens 74 



marinus 77 



mucronatiia 75 



mysticiie 75 



natans 72 



nitens 75 



Nuttallii 72 



Oakesianus 72 



obtusifolius 75 



paucifioruB 77 



pectinatua 78 



penaylvanicus 72 

 perfoliatuB 74, 76 



pinnatum 604 



polygonifolius 72 



praelongus 74 



pulcher 73 



pusillus 76 



rectifoliua 73 



Richardsonii 74 



Robbinsii 78 



rufeecene 73 



rutilus 76 



spathaeformis 74 

 apathulaeformia 74 



Spirillua 77 



strictifoUus 76 



Tttckermani 77 



Vaseyi 76 



Zizii 74 



zosterifolius 75 



Potato 71^ 



Potato-vine, Wild 



670 



Potentilla 481 



Anserina 484 



argentea 482 



arguta 481 



canadensis 484 



caroliniana 484 



effusa 483 



Egedii 484 



frigida 483 



fruticosa 483 



Hippiana 483 



intermedia 482 



leucocarpa 482 



litoralia 482 



monspeliensia 482 



nemm-alis 484 



Nicoiletii 482 



norvegica 482 



Nuttallii 483 



palustris 483 



paradoxa 482 



pennsylvanica 4S2 



pentandra 482 



proeumbens 484 



pumila 484 



recta 483 



reptans 484 



rivalis 482 



Robbinsiana 483 



simplex 484 



8ulphurea 483 



supina 482 



tridentata 483 



Poterium 494 



canadenae 494 



Sanguisorha 494 



Poverty Grass 124 



