302 



INDEX. 



Page. 



CEnothera 83 



OLEACE^ , 181 



Oleaster Family 194 



Olive Family 181 



ONAGEACE.*; 81 



Onion 243 



Onoclea 264 



Onopordon 110 



Onosmodium 470 



QpHIOGLOSSA0E.a! 2.o9 



Ophioglossum 267 



Opuntia 86 



Orache 186 



Orange-root ....'. 9 



OBCHIDACE^ 226 



Orchis 229 



Orchis Family 226 



OKOBANCHACE^ 150 



Orpine 78 



Orpine Family 78 



Ortliocarpus 167 



Osmorrhiza 91 



0SMnNDACE.2E 259 



Osmnnda 265 



Ostrich Fern 264 



Ostrya 207 



Oswego Tea 184 



OXALIDACEJE 42 



Oxalis 42 



Ox-Eye 130 



Ox-eye Daisy 126 



Oxytropis 66 



Painted-Cup 157 



Papaver 14 



PAPAVEBACEvE 14 



Papaw 10 



Parietaria 201 



Parnassia _. 76 



Paronychia '. 183 



Parsley Family 87 



Parsnip 89 



Patridge-berry 100 



Pasque-Flower 3 



Pastinaca 89 



Pasture Sage-brush, 113 



Page. 



Pear 73 



Pearl-wort 36 



Pedicularis 158 



Pellsea 260 



Pellltory . . . .' .~ 201 



Peltandra . . r 218 



Pennycress , 24 



Pennyroyal 164 



Penthoi-um 78 



Pentstemon 155 



Pepper Family 182 



Pepperidge 94 



Peppergrass 24 



Peppermint 163 



Pepper-root ~ 19 



Petalostemon .58 



Petasites 121 



Peucedanum 89 



PHANEROGAMS 1 



Phegopteris ' 261 



Phlox 172 



Phryma 159 



Physalis 175 



Physostegia 166 



Phytolacca 183 



PHYTOLACCACEvE 183 



Picea 215 



Pickerel-weed 247 



Pickerel-weed Family 247 



Pignut 203 



Pigweed 185 



Pilea 201 



Pimpernel 138 



Pine ?15 



Pine-drops 144 



Pine Family". 214 



Pine-sap ^ 144 



Pingnicula 1.51 



Pink Family 32 



Pinus '. . 215 



Pinweed 29 



PIPERACE^ -....;.. 182 



Pipewort 247 



Pipewort Family. 247 



Pipsissewa 144 



