322 



INDEX. 



Page. 



Pinkfaniily 153 



ground 235 



Indian 228 



moss 235 



wild 154 



Pinkweed 146 



Pinweed 205 



Piper, C. V 15 



Pipewort 115 



family 115 



Pipsissewa 221 



spotted 221 



Pitch pine 61 



Pitcher-plant 170 



family 170 



Plantaginaceae 256 



Plantago 256 



Plantain 256 



bottle-brush 256 



common 257 



English 257 



family 256 



heart-leaf 257 



Indian 291 



mud 117 



robin's 282 



water 64 



Platanaceae 173 



Platanus 173 



Pleurisy-root 232 



Pleuropterus 147 



Pluchea 283 



Plum, Chickasaw 180 



^\-ild 180 



Plume-grass 66 



Poa , 87 



Poaceae 66 



Podophyllum 160 



Podostemaceae 171 



Podostemum 171 



Pogonia 129, ISO 



rose 129 



Poinsettia 197 



Poison hemlock 219 



iv-y 198 



sumac 198 



Pokeweed 150 



family 150 



Polemoniaceae 235 



Polemonium 235 



PoJianthes 125 



Polycodium 224 



Polygala 193 



Polygalaceae 193 



Polygonaceae 144 



Polygonatum : 123 



Polygnnura 145, 146, 147 



Polymnia 285 



Polypodiaceae 53 



Polypodium 56 



Polypody 53 



gray 56 



Polypremum 228 



Polystichum 55 



Pondiily, yellow 155 



Pondweed 62 



Page 



Pondweed, bushy 64 



family 62 



horned 64 



sago 64 



Pontederia 116 



Pontederiaceae 116 



Poor-man's weather-glass 226 



Poor-weed 258 



Poplar 134, 161 



black 134 



Bolle's 135 



Carolina 134 



gray 135 



Lombardy ] 34 



silver 135 



swamp 135 



white 135 



Poppy 1 62 



family 102 



prickly 162 



Populus 134 



Porteranthus 175 



Portuiaca 1 50 



Portulacaceae 150 



Post oak 140 



Potamogeton ' 62 



Potamogctonaceae 62 



Potato 247 



pea 189 



sweet 233 



vine 233 



Potcntilla 176 



Poterium 177 



Potomac Side Naturalists' Club 13 



Potomac Valley region, flora of 17-18 



Poverty grass; 82 



Prairie willow 134 



Prenanthes 265 



Prickly ash 192 



lettuce 266 



pear 211 



poppy 162 



Primrose, evening 214 



family 225 



violet 208 



Primulaeeae 225 



Prince's-Ieather 146 



Privet 228 



Prosei^pinaca 215 



Prunella 243 



Prunus 179 



Psedera 201 



Ptelea 192 



Pteretis .-. . . 54 



Pteridiimi 54 



Pteris 64 



Ptilimnium 219 



Puccoon, hoary 238 



Pueraria 190 



Purple flreweed 213 



foxglove 253 



loosestrife 212 



millrweed 232 



orchis 129 



s neezeweed 290 



top 86 



