XVI 



INDEX. 



Page. 



Pamassiaceae 353 



Parsley family 383 



fern 2C5 



Parsnip 386 



cow 386 



meadow 384 



water 385 



Pasque-flower 343 



Pastinaea 386 



Pathfinder 430 



Payne, W.W 253 



Pea, yellow 369 



Peachleaf willow 320 



Pear 366 



Pearlwort. 336 



Pearly everlasting 429 



Pectianthia . 354 



Pedicularis 409 



Pellaea 266 



Pemmican 367 



Pentstemon 404 



Peppergrass 345 



Peramium 316 



Peritoma 352 



Persicaria 328 



Petasites 434 



Phaca 372 



Phacelia 398 



Phalaris 282 



Phegopteris 267 



Phleum 283 



Phlox 397 



family 396 



Phyllodoce 390 



Physaria 346 



Ph ysocarpus , 359 



Picea 275 



Pigweed 332 



family 332 



Pin cherry 367 



Pinaeeae 273 



Pincushion plant 396 



Pine 273 



family 273 



limber 274 



lodgepole 274 



western white 274 



western yellow 273 



whitebark 274 



Pineapple-weed 432 



Pinedrops 390 



Pinesap 390 



Pinguicula 410 



Pinguiculaceae 410 



Pink aster 423 



carpet 334 



corydalis 344 



dogbane 395 



family 333 



meadowsweet 359 



pyrola 389 



Pinus 273 



Piperia 317 



Pipsissewa 388 



Plantaginaeeae 411 



Plantago 411 



Plantain 411 



family 411 



Plum 367 



Poa 288 



Poaceae 280 



Pod fern 266 



Poison camas 310 



Polemoniaceae 396 



Polemonium 396 



Polygonaceae 326 



Polygonum 327 



Polypodiaceae 264 



Polypodium 265 



Polypody family 264 



western 265 



Polystichum 267 



Pondlily, yellow 338 



Pondweed 278 



family. 278 



horned 278 



Poplar, western balsam 318 



Poppy 344 



family 344 



Populus 317 



Porcupine grass 282 



Portulacaceae 332 



Potamogeton 278 



Potamogetonaceae 278 



Potentilla 359 



Poverty-weed 331 



Prairie gentian 394 



Prenanthes 419 



Prickly lettuce 417 



Primrose family 393 



Primulaceae 393 



Prune 367 



Primella 402 



Pnmus 367 



Pseud otsuga 276 



Pteridium 265 , 



Pterospora 390 



Ptilocalais 417 



Puccinellia 290 



Puccoon 400 



Pulsatilla 343 



Purple avens 363 



clematis 339 



geranium 374 



hedysanun ; 370 



onion 311 



rockcress 351 



saxifrage 356 



violet 377 



Purslane family 332 



speedwell 407 



Pussy toes 427 



Pyrola 388 



family 388 



Pyrolaceae 388 



Pyrrocoma 422 



Quaking aspen 318 



Quamasia 312 



Queencup 312 



Quince 366 



Radicula 346 



Ragweed 430 



