INDEX. 



Oat 46 



Smooth Wild 46 



Oat grass, Tall 45 



Ocean Spray 202 



Oenanthe 265 



Oenothera 253 



Old Man Root 342 



OLEACEAE 287 



Oleaster Family 244 



Olive Family 287 



Olsynium 106 



ONAGRACEAE 246 



Onion 95 



OPHIOGLOSSACEAE 



Ophioglossum 9 



Ophrys 109 



Opulastcr 201 



Opuntia 244 



Orchard-grass 52 



ORCHIDACEAE 106 



Orchid Family 106 



Oregon Ash 287 



Oregon Grape 164 



Oreostemma 370 



OROBANCHACEAE 330 



Orobanche 331 



Orogenia 267 



Orthocarpus 329 



ORYZEAE 32 



Osmaronia 199 



Osmorhiza 259 



OXALIDACEAE 229 



Oxalis 230 



Oxeye Daisy 380 



Oxycoccus 277 



Oxyria 126 



Oxytropis 227 



Oyster Plant 353 



Ozomelis 195 



Pachistima 234 



Pacific Christmas Fern 7 



Paeonia 161 



Paint Brush, Indian 327 



Painted Cup 327 



Panicularia 58 



PANICEAE 32 



Panicum 35 



PAPAVERACEAE 164 



Parnassia 188 



Parsley Family 255 



Parsnip 262 



Cow 260 



Pasapalum 35 



Pasque Flower 154 



Pastinaca 262 



Pear, Prickly 244 



Pearl-wort 148 



Pedicularis 326 



Pellaea 4 



Penny Cress 181 



Pentacaena 144 



Pentstemon 317 



Peony 161 



Peppergrass 179 



Peramium Ill 



Perennial Rye-grass 61 



Petasites 382 



Phacelia 297 



PHALARIDEAE 32 



Phalaris 36 



Phegopteris 3 



Philadelphia 188 



Phleum 38 



Phlox 293 



Phlox Family 292 



Phoradendron 123 



Phyllodoce 281 



Phyllospadix 28 



Physostegia 312 



Picea 22 



Pigweed 134, 135 



Pimpernel 285 



False 320 



PlNACEAE 17 



Pine 19 



Bull 20 



Ground 13 



Knobcone 20 



Lodgepole 20 



Running 14 



Sugar 20 



Western White 19 



White-bark 19 



Yellow 20 



Pine Family 17 



Pine Lily 102 



Pinguicula 332 



Pink 142 



Deptford 142 



Indian 327 



Mullein 144 



Pink Family 141 



Pinus 19 



Piperia 110 



Pipes 12 



Pipsissewa 273 



Piscaria 231 



Pityopus 271 



Plagiobothrys 304 



Platystigma 165 



PLANTAGINACEAE 333 



Plantago 333 



Plantain . . 333 



