INDEX 



675 



Potamogeton nitens, 84 

 Nuttallii, 82 

 Oakesianus, 18, 81 

 obtusifolius, 84 

 pectinatus, 23, 84 

 perfoliatus, 83 

 praelongus, 5, 83 

 pulcher, 83 

 pusillus, 84 

 Richardsonii, 83 

 Rcbbinsii, 83 

 Spirillus, 8 1 

 Vaseyi, 81 

 Zosteraefolius, 84 



Potentilla, 363 

 argentea, 364 

 canadensis, 364 

 intermedia, 364 

 monspeliensis, 364 

 pacifica, 365 

 paradoxa, 364 

 pumila, 364 

 recta, 364 

 simplex, 364 

 sulphurea, 364 



Poterium, 367 



Sanguisorba, 367 



Prinuilaccae, 497 



Proserpinaca, 469 

 intermedia, 469 

 palustris, 469 

 pectinata, 469 



Prunella, 532 



laciniata, 532 

 vulgaris, 532 



Prunus, 391 



alleghaniensis, 392 

 americana, 392 

 mollis, 392 

 angustifolia, 392 

 Avium, 393 

 Cerasus, 393 

 cuneata, 393 

 domestica, 393 

 Gravesii, 32, 392 

 institia, 393 

 Mahaleb, 393 

 maritima, 392 

 nigra, 393 

 pennsylvanica, 393 

 pumila, 392 



Primus serotina, 391 

 Psilocarya, 172 



nitens, 15, 28, 172 

 Ptelea, 419 



trifoliata, 419 

 Pteridium, 61 



aquilinum, 61 

 Pleris, 61 

 Ptilimnium, 479 



capillaceum, 11,479 

 Puccinellia, 144 



angus, 144 



Borreri, 144 



distans, 144 



fasciculata, 144 

 Pueraria Thunbergiana, 413 

 Pyrola, 485 



americana, 485 



chlorantha, 25, 29, 485 



elliptica, 485 



oxypetala, 7, 32, 485 



rotundifolia, 485 



secunda, 28, 485 

 pumila, 485 

 Pyrolaceae, 484 

 Pyrus, 382 



communis, 382 

 Pyxidanthera, 496 



barbulata, 16, 496 



Quamoclit, 514 



coccinea, 514 



Quamoclit, 514 

 Quercus, 275 



acuminata, 278 



alba, 279 



Alexanderi, 278 



bicolor, 278 



borealis, 276 



coccinea, 277 



digitata, 277 



ilicifolia, 277 



imbricaria, 15, 278 



lyrata, 15, 279 



macrocarpa, 279 



marilandica, 15, 277 



Michauxii, 15, 278 



Muhlcnbergii, 278 



nana, 277 



nigra, 15, 277 



pagodaefolia, 15, 277 



Quercus palustris, 276 

 Phellos, 15, 277 

 platanoides, 278 

 prinoides, 278 

 Prinus, 278 

 rubra, 22, 276 

 stellata, 279 

 triloba, 15, 277 

 velutina, 276 



Radicula, 341 

 hispida, 341 

 palustris, 341 

 sylvestris, 341 



Raimannia, 466 



humifusa, 16, 466 

 laciniata, 16, 466 

 rhombipetala, 467 



Ranunculaceae, 317 



Ranunculus, 325 

 abortivus, 326 

 acris, 327 



allegheniensis, 6, 327 

 arvensis, 329 

 bulbosus, 327 

 delphinifolius, 326 

 fascicularis, 328 

 Graecus, 329 

 hispidus, 22, 328 

 lanuginosus, 329 

 micranthus, 6, 327 

 obtusiusculus, 326 

 parviflorus, 329 

 parvulus, 329 

 pennsylvanicus, 327 

 pusillus, 16, 326 

 recurvatus, 327 

 repens, 328 

 reptans, 326 

 sceleratus, 327 

 septentrionalis, 328 

 villosus, 329 



Raphanus, 340 



Raphanistrum, 341 

 sativus, 341 



Rapistrum rugosum, 349 



Ratibida, 624 

 pinnata, 624 



Razoumofskya, 284 

 pusilla, 6, 19, 284 



Reseda, 350 



