INDEX. 
442 
Pennyroyal, 299 
Pencil Tree, 366 
Pentstemon, 306 
Pepper-grass, 151 
Peramium, 89 
Peraphyllum, 192 
Pericome, 376 
Peritoma, 168 
Persicaria, 111 
Petalostemon, 215 
Petasites, 387 
Peteria, 202 
Petradoria, 349 
Peucedanum, 256 
Phaca, 205-210 
Phacelia, 282 
Phacopsis, 206 
Phalaride.®:, 22 
Phalaris, 22 
Phegopteris, 2 
Phellopterus, 254 
Philadelphus, 176 
Phileozera, 381 
Philotria, 15 
Phippsia, 28 
Phleum, 28 
Phlox, 274 
Phlox, 274 
Phlox Family, 274 
Phoradendron, 100 
Phragmites, 37 
Phyla, 294 
Phyllodoce, 260 
Physails, 300 
Physaria, 154 
Physocarpus, 179 
Physostegia, 297 
Picea, 8 
Pickerell-weed Family, 75 
Picradenia, 380 
Picradeniopsis, 377 
Picrothamnus, 382 
Pigmy-weed, 169 
Pig-weed, 114, 120 
Pinace^e, 7 
PlNALES, 7 
Pine Drop, 258 
Pine Family, 7 
Pines, 7, 8 
PlNGUICULACEJE, 319 
Pink Family, 132 
Pinons, 8 
Pinus, 7, 8 
Piperia, 88 
Pipsissewa, 258 
Piptocalyx, 286 
Plantaginace^e, 320 
Plantaginales, 320 
Plant ago, 320 
Plantain, 320 
Plantain, Rattlesnake, 89 
Plantain Family, 320 
Platyschkuhria, 377 
Pleurogyne, 267 
Pluchea, 367 
Plum Family, 193 
Plums, 193 
Poa, 40, 50 
Poacee:, 15 
Poales, 15 
Podalyriee:, 195 
Poison Camass, 77 
Poison Ivy, 225 
Poison Oak, 225 
Poinsettia, 225 
Polanisia, 168 
POLEMONIACEE:, 274 
POLEMONIALES, 27 1 
Polemonium, 280 
Poliomintha, 298 
Poly gala, 221 
POLYGALACE.E, 221 
POLYGALALES, 221 
POLYGONACEE:, 101 
POLYGONALES, I 01 
Polygonatum, 85 
Polygonum, 109, m-113 
Polypappus, 367 
POLYPODIACEEJ, I 
Polyp odium, 2 
Polypody, 2 
Polypogon, 30 
Polypteris, 377 
Polystichum, 2 
Pome Blanche, 213 
Pond-weed, 12 
Pond-weed Family, 12 
PONTEDERI ACEEi, 75 
Poplar, 91 
Poppy, 148 
Poppy, Prickly, 148 
Poppy Family, 148 
Poppy Mallow, 229 
Populus, 91 
Porcupine Grass, 23 
Portulaca, 126 
Portulacacee:, 125 
Potamogeton, 12 
Potato, 302 
Potatoe, Hogs’, 77 
Potentilla, 180, 186, 187 
Poverty Grass, 23, 29 
Powder-horn, 128 
Prairie Bean ( Thermopsis ) 
Prairie Clover, 215 
Prairie-grass, 38 
Prairie Mimosa, 194 
Prenanthella, 404 
Prenanthes, 404 
Prickly Pear, 238 
