674 



INDEX 



Plantago halophila, 567 



heterophylla, 569 



intermedia, 567 



lanceolata, 568 



major, 567 



maritima, 20, 568 



pusilla, 568 



Rugelii, 568 



virginica, 568 

 Platanaceae, 360 

 Platanus, 360 



occidcntalis, 360 

 Pleuropterys, 295 



Zuccarinii, 295 

 Pluchca, 617 



camphorata, 618 



foetida, 17, 618 

 Plumbaginaceae, 499 

 Pneumaria maritima, 525 

 Poa, 139 



alsodes, 5, 140 



annua, 140 



autumnalis, 14, 140 



brachyphylla, 14, 21, 



Mi 



brevifolia, 141 



compressa, 141 



■debilis, 5, 18, 140 



Jlava, 140 



pratcnsis, 141 



serotina, 140 



sylvcstris, 141 



triflora, 5, 140 



trivialis, 140 

 Poaceae, 90 

 Podophyllum, 331 



peltatum, 28, 331 

 Podostemaceae, 352 

 Podostemon, 352 



ceratophyllum, 352 

 Pogonia, 252 



affinis, 253 



divaricata, 15, 252 



ophioglossoides, 252 



trianlhophora, 253 



verticillata, 253 

 Polanisia, 350 



graveolens, 350 



trachysperma, 350 



viscosa, 350 

 Polemoniaceae, 517 



Polemonium, 518 

 reptans, 518 

 Van-Bruntiae, 7, 51? 



Polycodium, 493 



stamineum, 493 



Polygala, 420 



ambigua, 421 

 brevifolia, 421 

 cruciata, 421 

 incarnata, 29, 421 

 lutea, 16, 421 

 mariana, 16, 422 

 Nuttallii, 422 

 paucifolia, 423 

 polygama, 422 

 Senega, 422 



latifolia, 422 

 verticillata, 23, 421 

 viridescens, 422 



Polygalaceae, 420 



Polygonaceae, 286 



Polygonatum, 238 

 biflorum, 238 

 commutatum, 238 



Polygonella, 295 



articulata, 31, 295 



Polygonum, 289 



atlanticum, 290 

 aviculare, 290 

 buxiforme, 290 

 cuspidatum, 295 

 erectum, 290 

 exsertum, 289 

 Hartwrightii, 291 

 incarnatum, 292 

 littorale, 290 

 maritimum, 289 

 monspeliense, 290 

 ncglectum, 290 

 prolificum, 290 

 provinciale, 290 

 ramosissimum, 290 

 prolificum, 290 

 Rayi, 290 

 sachalinense, 295 

 sagittatum, 293 

 tenue, 290 

 tomentosum, 292 

 virginianum, 291 



Polymnia, 621 



canadensis, 621 



Polymnia Uvcdalia, 621 

 Polypodiaceae, 50 

 Polypodium, 62 



vulgare, 62 

 Polypogon, 127 



monspeliensis, 127 

 Polypremum, 502 



procumbens, 502 

 Polystichum, 53 



achrostichoides, 53 



Braunii, 5, 18, 53 

 Pontederia, 219 



cordata, 219 

 Pontederiaceae, 219 

 Populus, 261 



alba, 261 



candicans, 262 



deltoides, 262 



grandidentata, 262 



heterophylla, 261 



nigra, 262 



tremuloides, 23, 262 

 Porteranthus, 363 



trifoliatus, 363 

 Portulaca, 303 



grandiflora, 303 



oleracea, 303 



pilosa, 303 

 Portulacaceae, 302 

 Potamogeton, 79 



alpinus, 82 



americanus, 82 



amplifolius, 82 



angustifolius, 5, 82 



bupleuroides, 83 



compressus, 18, 84 



confcrvoides, 14, 84 



crispus, 83 



dimorphus, 81 



diversifolius, 81 



epihydrus, 81 



foliosus, 84 



gemmiparus, 84 



heterophyllus, 82 



Hillii, 84 



lateralis, 5, 18, 81 



lonchiles, 82 



lucens, 83 



connecticutensis , 82 



natans, 18, 81 



nitens, 84 



