30'J 



INDEX. 



PAGE. 



(Enothera 83 



OLEACE^E 181 



Oleaster Family 194 



Olive Family 181 



ONAGRACE^E 81 



Onion 243 



Onoclea 264 



Onopordon ' 110 



Onosmodium 170 



OPHIOGLOSSACE^i 259 



Ophioglossum 267 



Opuntia 86 



Orache 186 



Orange-root 9 



ORCHIDACE^E 226 



Orchis 229 



Orchis Family 226 



OROBANCHACE^E 150 



Orpine 78 



Orpine Family 78 



Orthocarpus '. . - 157 



Osmorrhiza 91 



OSMUNDACEJE 259 



Osmunda 265 



Ostrich Fern 264 



Ostrya 207 



Oswego Tea 164 



OXALIDACE^ffi 42 



Oxalis 42 



Ox-Eye 130 



Ox-eye Daisy 126 



Oxytropis 56 



Painted-Cup 157 



Papaver 14 



PAPAVERACE^E 14 



Papaw 10 



Parietaria 201 



Parnassia 76 



Paronychia 183 



Parsley Family 87 



Parsnip 89 



Partridge- berry 100 



Pasque-Flower 3 



Pastinaca 89 



Pasture Sage-brush 113 



PAGE. 



Pear 73 



Pearl-wort 36 



Pedicularis 158 



Pellaea 260 



Pellitory 201 



Peltandra 218 



Pennycress 24 



Pennyroyal 164 



Penthorum 78 



Pentstemon 155 



Pepper Family 182 



Pepperidge 94 



Peppergrass 24 



Peppermint 163 



Pepper-root 19 



Petalostemon 58 



Petasites 121 



Peucedanum 89 



PHANEROGAMS I 



Phegopteria 261 



Phlox 172 



Phryma 159 



Physalis 175 



Physostegia 166 



Phytolacca 183 



PH YTOLACCACE.E 183 



Picea 215 



Pickerel-weed 247 



Pickerel-weed Family 247 



Pignut ; 203 



Pigweed 185 



Pilea 201 



Pimpernel 138 



Pine 215 



Pine-drops 144 



Pine Family 214 



Pine-sap 144 



Pinguicula 150 



Pink Family ' 32 



Pinus 215 



Pinweed 29 



PIPERACE^E 182 



Pipewort 247 



Pipewort Family 247 



Pipsissewa 144 



