442 



INDEX. 



Pennyroyal, Joo 

 Pencil Tree, 366 

 Pcntstcmon, 306 

 Pepper-grass, 151 

 Pcrainium, 89 

 Pcrapliyllum, 192 

 Pcricomc, 376 

 Pcritoma. 168 

 Pcrsicaria, 1 1 1 

 Pctalostcmon, 215 

 Pctasites, 387 

 Peteria, 202 

 Petradoria, 349 

 Pcucedannm, 256 

 Phaca, 205-210 

 Phacelia, 282 

 Phacopsis, 206 

 P11ALARIDE.E, 22 

 Phalaris, 22 

 Phegopteris, 2 

 Phellopterus, 254 

 Philadelphus, 176 

 Phileocera, 381 

 Philotria, 15 

 Pliippsia, 28 

 Phleiim, 28 

 Phlox, 274 

 Ptilox, 2y^ 

 Phlox Family, 274 

 Phoradendron, 100 

 Phragmites, 2,7 

 Phyla, 294 

 Phyllodoce, 260 

 Physalis, 300 

 Physaria, 154 

 Physocarpus, 179 

 Physostegia, 297 

 F/ct-a, 8 



Pickerell-weed Family, 75 

 Picradenia, 380 

 Picradeniopsis, 2,77 

 Picrothaninus, 382 

 Pigmy-weed, 169 

 Pig- weed, 114, 120 



PlNACE^, 7 



Finales, 7 

 Pine Drop, 258 

 Pine Family, 7 

 Pines, 7, 8 



PlXGUICULACE^, 319 



Pink Family, 132 

 Pifions, 8 

 Pinus, 7, 8 

 Piperia, 88 

 Pipsissewa, 258 

 Piptocalyx, 286 

 Plantaginace^, 320 

 Plantaginales, 320 

 Plantago, 320 

 Plantain, 320 



Plantain, Rattlesnake, 89 

 Plantain Family, 320 

 Platyschkuhria, 2,77 

 Pleurogyuc, 267 

 Pluchea, 367 

 Plum Family, 193 

 Plums, 193 

 Poa, 40, 50 

 Poace^, 15 

 PoALES, 15 

 P0DALYRIE.E, 19s 

 Poison Camass, 77 

 Poison Ivy, 225 

 Poison Oak, 225 

 Poinsettia, 225 

 Polanisia, 168 



POLEMONIACE^, 274 

 POLEMONIALES, 27I 



Poleinonium, 280 

 Poliomintha, 298 

 Poly gala, 221 



POLYGALACE^, 221 

 POLYGALALES, 221 

 POLYGONACE^, lOI 

 POLYGONALES, I 01 



Polygonatum, 85 

 Polygonum, 109, 111-113 

 Polypappus, 367 



POLYPODIACE^, I 



Polypodiuin, 2 

 Polypody, 2 

 Polypogon, 30 

 Polypteris, 277 

 Polystichum, 2 

 Pome Blanche, 213 

 Pond-weed, 12 

 Pond-weed Family, 12 



PONTEDERIACE^, 75 



Poplar, 91 



Poppy- 148 



Poppy, Prickly, 148 

 Poppy Family, 148 

 Poppy Mallow, 229 

 Populiis, 91 

 Porcupine Grass, 23 

 Portulaca, 126 



PORTULACACE^, 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 



