914 



INDEX 



Poison Ivy 552 



Oak 552, 553 



Sumach 552 



Poke, Common 374 



Milkweed 665 



Pokeweed 374 



Family 374 



Polanisia 438 



graveolens 438 



trachysperma 438 



POLEMONIACEAE 673 



Polemonium 676 



coeruleum 676 



Family 673 



reptans 676 



Van Bruntiae 676 



Polycodium candi- 



cans 639 



melanocarpum 639 



veglectum 639 



stamineum 639 



Polygala 538 



amhigua 540 



brevifolia 540 



cruciata 539 



Curtissii 539 



cymosa 540 



fastigiata 539 



Fringed 538 



incarnata 539 



lutea 540 



mariana 539 



Nuttallii 539 



pauciflora 538 



polygama 539 



ramosa 540 



sanguinea 539 



Senega 539 



verticillata 540 



viridescens 539 



POLYGALACEAE 538 



POLYGONACEAB 353 



Polygonatum 292 



biflorum 292 



boreale 292 



commutatum 292 



cuneatum 292 



giganteum 292 



virginicum 292 



Polygonella 363 



americana 363 



articulata 363 



ericoides 364 



Polygonum 357 



acre 361 



amphibium 360 



arifolium 362 



aviculare 358 



camporum 359 



Careyi 361 



cilinode 362 



Convolvulus 362 



cristatum 363 



cuspidatum 363 



densiflorum 360 



Douglasii 359 



dumetorum 363 



emersum 361 



erectum 359 



exsertum 358 



Fowleri 358 



Hartwrightii 361 

 Hydropiper 361 

 hydropiperoides 



362 

 incarnatum 360 

 lapathifolium 360 

 liUorale 359 



longistylum 361 

 maritimum 358 

 Muhlenbergii 361 

 opelousanum 362 

 orientale 361 



pennsylvanicum 



361 

 Persicaria 361 



portoricense 360 

 prolificum 358 



punctatum 361 

 ramosissimum 



358, 359 

 Rayi 358 



sagittatum 362 

 scandens 362 



setaceum 362 



tenue 359 



tomentosum 360 

 virginianum 362 

 viviparum 359 



Zuccarinii 363 

 Polymnia 824 



canadensis 824 

 uvedalia 824 



POLYPODIACEAB 33 



Pplypodium 34 



incanum 34 



polypodioides 34 



vulgare 34 



Polypody 34 



Polypogon 133 



monspeliensis 133 



Polypremum 653 



procumbens 654 



Polypteris 843 



oallosa 844 



Polystichum 40 



acrostichoides 40 



Braunii 41 



Lonchitia 40 



Polytaenia 620 



Nuttallii 620 



Pomme blanche 512 



Pommede Prairie 512 



Pond Pine 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 328, 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 415 



Mallow 568 



Mexican 416 



Plume 415 



Prickly 416 



Sea 415 



Populua 328 



alba 328 



balsamifera 329 



candicans 329 



deltoides 329 



grandidentata 328 



heterophylla 329 



monilifera 329 



nigra 329 



tremuloides 328 



Porcupine Grass 124 



Porteranthua 457 



stipulatus 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 



angustifolius 74 



bupleuroides 75 



confervoides 77 



crispus 75 



dimorphus 77 



diversifolius 77 



epihydrus 72 



Faxoni 73 



fiUformis 77 



fiuitans 73 



fohosus 77 



Friesii 75 



gemmiparus 76 



heterophyllus 73 



Hillii 75 



hybridus 77 



illinoensis 73 



interior 77 



interruptus 78 



laterahs 76 



lonchites 73 



lucens 74 



marinus 77 



mucronatus 75 



mysticus 75 



natans 72 



nitens 75 



Nuttallii 72 



Oakesianus 72 



obtusifoUus 75 



paucifiorus 77 



pectinatus 78 



pensylvanicus 72 

 perfohatus 74, 76 



pinnatum 604 



polygonifolius 72 



praelongus 74 



pulcher 73 



pusillus 76 



rectifohus 73 



Richardsonii 74 



Robbinsii 78 



rufescens 73 



rutilus 76 



spathaeformis 74 

 spathulaeformis 74 



Spirillus 77 



strictifoUus 76 



Tuckermani 77 



Vaseyi 76 



Zizii 74 



zosterifolius 75 



Potato 712 



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 



litoralis 482 



monspeliensis 482 



nemoralis 484 



Nicolletu 482 



norvegica 482 



NuttaUii 483 



palustris 483 



paradoxa 482 

 pennsylvanica 482 



pentandra 482 



procumbens 484 



pumila 484 



recta 483 



reptans 484 



rivalis 482 



Robbinsiana 483 



simplex 484 



sulphur ea 483 



supina 482 



tridentata 483 



Poterium 494 



canadense 494 



Sanguisorba 494 



Poverty Grass 124 



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