223 



PAGE 



Orache 139 



Oreocarya 186 



Oregon Woodsia 103 



Orchids 130 



Orobanchace^E 194 



Orobanche 194 



Orophaca 163 



Orpine Family 152 



Orthocarpus 193 



Oryzopsis iii 



Osrnorrhiza 178 



Ostrich-fern 103 



Ostrya 133 



OXALIDACE.K 166 



Oxalis 166 



Ox Eye 208 



Oxygraphis 146 



Oxytropis 163 



Pachylophus. 175 



Tainted Cup 193 



Panicularia 117 



Panicum 109 



Papaverace-K 147 



Papillionace.*: 15S 



Parietaria 135 



Parnassia 152 



Paronichia 143 



Parosela i6r 



Parsley 177 



Parsnip 178 



Parthenocissus 170 



Pasque Flower 145 



Pastinaca 177 



Pea Family 158 



Pedicularis 193 



Pellaea 104 



Pellitory 135 



Pennyroyal 189 



Penthorum 152 



Pentstemon 191 



Pepper-grass 148 



Peramium 131 



Persicaria 136 



Fetalostemon 161 



Petasites 211 



Peucedanum 177 



Phaca 163 



PAGE 



Phalaris no 



Phegoptoris 103 



Philotria 108 



Phleum IT2 



Phlox 185 



Phlox Family 185 



Phragmites 115 



Phryma I94 



PHRYMACEyE 194 



Physalis 19° 



Physaria 150 



Physostegia 189 



Picea 105 



Pickerel-weed • 126 



Picradenia 210 



Pigeon grass no 



Pigweed 138 



Pilea 135 



PiNACE.E. Pinus 105 



Pine Drops j8o 



Pinks 141 



Pl,ANTAGINACE^ 194 



Plantago 194 



Plantain Family i94 



Pleurisy Root 183 



Plum Family 157 



Poa 116 



Poison Ivy • • - 169 



Poison Oak 169 



Polanisia 152 



POLEMONIACE^ 185 



Polygala 167 



POLYGAlvACE^ 167 



POLYGONACE^ 135 



Polygonatum 1 29 



Polygomum 136 



PoLYPODiACE^ 103 



Polypodium 104 



Polypody 104 



Pomaces 156 



Pond Lily I43 



Pond Weed 106 



Poplar. 132 



Poppy Family 147 



Populus 132 



Porcupine Grass iii 



Portulaca 141 



