INDEX. 



293 



Pear, Prickly 167 



Pedicularis 229 



Pellaea 



Penny cress 123 



Pentstemon 221 



Peony 110 



Peppergrass 122 



Peramium 71 



Petasites 252 



Phacelia 203 



Phalarideae 19 



Phalaris 21 



Phegopteris 2 



Phleum 23 



Phlox 197 



Phoenicaulis 115 



Phyllodoce 189 



Physaria 121 



Picea 11 



Pig-weed. 90, 91 



Pimpernel, False 226 



Pink, Indian 229 



Pink family 95 



PlNACEAE 9 



Pine 10 



Bull 11 



Lodgepole 10 



Western white 10 



Yellow 11 



Pine family 9 



Pine lily 64 



Pinus 10 



Piperia 70 



Pipsisseiva 186 



Plagiobothrys 210 



PLANTAGINACEAE 232 



Plantago 232 



Plantain 232 



Common 232 



English 233 



Rattlesnake 72 



Plantain family 232 



Platyspermum 120 



Plum 132 



Poa 33 



POACEAE 18 



Poison ivy 158 



parsnip 182 



POLEMONIACEAE 197 



Polemonium 200 



POLYGONACEAE 81 



Polygonum 85 



POLYPODIACEAE 1 



Polypogon 24 



Polystichum 3 



Pondweed 15 



Pondweed family 53 



PONTEDERIACEAE 53 



Poppy family 112 



Populus 75 



Portulaca 92 



PORTULACACEAE 92 



Potamogeton 15 



POTAMOGETONACEAE 14 



Potentilla 139 



Pretty willow 75 



Prickly lettuce 249 



pear 167 



PRIMULACEAE 189 



Primrose family 189 



Prunella 215 



Prunus 132 



Pseudotsuga 12 



Psilocarphus 262 



Psoralea 146 



Pteridium 



PTERIDOPHYTA 1 



Pterospora 186 



Pteryxia 184 



Ptilocalais 246 



Ptilonella 276 



Ptiloria 246 



Purslane 92 



Purslane family 92 



Pyrola 187 



Pyrola family . . 185 



PYROLACEAE 185 



Pyrus 134 



Quack grass 40 



Quamasia 62 



Quillwort 7 



Rabbit brush 259 



Rabbit's ear clover 147 



Radicula 118 



Ragweed 257 



Ramona 214 



RANUNCULACEAE 102 



Ranunculus 107 



Raspberry, Red 136 



Rattlesnake plantain 72 



Razoumofskya 80 



Red clover 148 



raspberry 136 



Redtop 27 



RHAMNACEAE 160 



Rhamnus 161 



Rhinanthus 228 



Rhus 158 



Ribes 125 



Rigiopappus 279 



Rock cress 115 



Rose. , 92 



