373 



Pack. 



Platanthera, I20, 121 



PLAtANACE/E, l8l 



Platanus, l8l 



Plectocephalus 345 



Pleurogyne, 261 



Pletirolobus, 202 



Pleuropogon, 51 



Pluchea, 329 



Plumbaginace^, 255 



Pneumaria, 274 



Poa, 52, 353 



Poa, 40, 48, 49. 54, 55. 353 



Podalyria, 193 



Podophyllum, 162 



PodoscBiHitm, 37 



PODOSTEMACE^, 1 76 



Podostemon, 176 



Pogonia, 122 



Polanisia, . . . . , 175 



POLEMONIACE^, 269 



Polemonium, 270 



Polemoniu7n, 271 



Polygala, 211 



POLYGALACE^, 211 



POLYGONACE^ 1 37 



Polygonatum, 1 15 



Polygonella, 141 



Polygonum, 139 



Polygonum, I41, 355 



Polymnia, 330 



Polyotus, 264 



Polypodium, 9 



Polypodhim, II, 12, 14 



Polypogon, , . 40 



Polypogou, 37 



Polypremum, 258 



Polypteiis 338 



PolytKnia, 240 



Poinaria, 193 



Pontederia, 105 



PONTEDERIACE^, I05 



Populus 128 



Porteranthus, 181 



Portulaca 147 



PORTULACACEyC, 1 47 



Potamogeton, 20 



Potamogeton, 237 



Potentilla, 186 



Potentilla, 188 



Poterium, 189 



Pothos, lOl 



Prasium, 284 



Prenanthes, 350 



Primula, 254 



Primulace^, 254 



Prinos, 217 



Prionopsis, 316 



Prosartes, 115 



Proserpinaca, 237 



Prunella 284 



Page. 



Prunus, 190, 357 



Psamma, 42 



Psilocarya, 64 



Psilostiophe, 338 



Psoralea, 195 



Psoralea, . ........ 196, 200 



Ptelea, 211 



Pteris, 10 



Pterospora, 247 



Ptilepida, 339 



Ptilimnium, 244 



Puccinellia, 53 



Pubnonaria, 214 



Pulsatilla, 158 



Piirshia, 237 



Pycnanthetnum, 279 



Pyycthriim, 340 



Pyrola, 247 



Pyrolace/E 246 



Pyrrhopappus, 349 



Pyrularia, 136 



Pyrus, 182 



Pyrtts, 183 



Pyxidanthera, 253 



Qiiamoclit, 266 



Quercus, 132, 355 



Queria, 153 



Quinaria, 22 1 



Raja7iia, 142 



Ranunculace/E, 155 



Ranunculus, 159 



Ramuiculiis, 161, 356 



Raphanus, , 168 



Razoumofskya, 136 



Reboiilea, 50 



Redfieldia, 48 



Reiicalmia, 104 



Reseda, 176 



Resedace^, 176 



Rhamnace^, . , ,. 220 



Rhamnus, 220 



Rhexia, 232 



Rhinanthus, 296 



Rhinanthtis, 295 



Rhodiola, 177 



Rhododendron, 248 



Rhodora, 248 



Rhus 216 



Rhynchosia, 209 



Rhyitchospora, 64, 66 



Ribes, 180 



Ricinus, 213 



Ridan, 335 



■ Riddellia, 338 



Robertsojiia, 178 



Robinia, 198 



Roripa, 169 



Rosa 190, 357 



