Pach3'lophus, 



Facliypodiuni, 



Pachystima, 



Panax, 



Panicularia, 



Panicum, 



Paiiicuvi, 20, 21 



Papaver, 



PAPAVERACEAE, 



PAPIUONACEAE, 



Parietaria, 



Parnassia, 



PARNASSIACEAK, 



Paronychia, 



Pastinaca, 



Pedicularis, 



Pedicularis, 



Pellaea, 



Pentstemon, 



Peramium, 



Petalostemon, 



Petasites, 



Petrophyton, 



Peucedatium, 



Phaca, 



Phaca, 242, 244-246, 249 



Phacelia, 323 



Phalangiuvi, 100 



Phalans, 21 



Plialaris, 41 



Phegopteris, 3, 466 



Philadelphus, 201 



Philipaea, 367 



Phleum, 26 



Phlox, 312, 480 



Phragmites, 42 



Phyllodoce, 298 



Physalis, 341 



Physaria, 178 



Physostegia, 340 



Picea, 10, 468 



Picea, 12 



Picradenia, 424 



Picradenia, 424 



PINACEAE, 8 



Pinguicula, 482 



Pinus, 8, 118,468 



PitinSy 12 



PLANTAGINACEAE, 368 



Plantago, 368 



Platanthera, 103. 105, 106 



Poa, 45 



Poa, 53-55, 58 



Polanisia, 190 



POLEMONIACEAE, 312 



Polemonium, 321 



Polygala, 266 



POLYGALACEAE, 266 



POLYGONACEAE, 119 



Polygonum, 126,472 



POLYPODIACEAE, 2 



Polypodium, 5 



Polypodium, 2, 3, 4 



Polypogon, 30 



Polystichum, 3 



POMACEAE, 227 



Populus, 115 



Porterella, 482 



PORTULACACEAE, 137 



Potamogeton, 15, 468 



Potentilla, 208 



Poientilla, 216-221 



Prenanthes, 453, 456, 463 



RANUNCULACEAE, 152 



Ranunculus, 162, 474 

 Ranunculus, 168, 169, 474 



Ratibida, 417 



Razoumofskya, 118 



RHAMNACEAE, 270 



Rhamnus, 270, 479 



Rhinanthus, 366 



Rhodiola, 190 



Rhododendron, 297 



Rhus, 268, 479 



Ribes, 201, 476 



Roripa, 174 



Rosa, 224, 477 



ROSACEAE, 205 



RUBIACEAE, 374 



Rubus, 207, 476 



Rudbeckia, 416 



Rudbeckia, 417 



Rumex, 124 



Rutne.v, 125 



Ruppia, 18 



Rydbergia, 424 



Sagina, 147 



Sagittaria, 19 



SALICACEAE, 109 



Salicornia, 135 



Salix, 109, 472 



Salsola, 136 



Salvia, ' 339 



Sambucus, 369 



Sanicula, 292 



SANTALACEAE, 119 



Saponaria, 143 



Sarcobatus, 135 



Savastana, 22 



Saxifraga, 191, 476 



Saxifraga, 195 



SAXIFRAGACEAE, 191 



Schedonnardus, 42 

 SCHEUCHZERIACEAE, 18 



Schoenocrambe, 173 



Scilla, 100 



Scirpus, 70, 470 

 Scirpiis, 69, 70, 471 



Scorzonella, 452 



491 



Scrophularia, 481 

 SCROPHULARIACEAE, 342 



Scutellaria, 340 



Sedum, 190 



Selaginella, 7 

 SELAGINEIvIvACEAE, 7 



Selimim, 292, 293 



Senecio, 437 



Serratula, 448 



Set aria, 20, 468 



Shepherdia, ^-jt,, 274 



Sibbaldia, 218 



Sibbaldia, 221 



Sieversia, 222 



Silene, 141, 473 



Silene, 143 



Si/iapis, 174 



Sisymbrium, 47=; 

 Sisymbrium, 

 Sisyrincliivim, 



Sitanion, 66, 470 



Slum, 291 



Sium, -^ 292 



Smelowskia, 183 



Smilacina, 100 



vSOLANACEAE, 341 



Solanum, 341, 48t_ 



Solidago, 386 



Solidago, 379, 389 



Sonchus, 455 



Sonchus, 455 



Sophia, 184, 475 



Sorbus, 227, 477 



SPARGANIACEAE, 14 



Sparganium, 14 



Spartina, 41 



Specularia, 378 



Spergula, 147 



Spergularia, 151 



Sphaeralcea, 258 



Sphaeromeria, 427 



Sphaerostigma, 281 



Spiesia, 250, 255 



Spiraea, 206 



Spiraea, 205-207 



Spiranthes, 107 



Sporobulus, 28 



Spraguea, 138 



Stachys, 341 



Stanleya, 172 



Steironema, 307 

 Slellaria, I43-I45, 473 



Stenactis, 40J 



Stenanthium, 93 



Stenotus, 382 



Stenotus, 383 



Sfephanomeria, 453 



Stipa, 22 



Stipa, 25 



Streptopus, loi 



Stylopappus, 460 



Suaeda, 135 



Subularia, 172 



Suckleya, 133 



Suksdorfia, 476 



Swertia, 311 



Swertia, 480 



Symphoricarpos, 370 



Synthyris, 352 



Syntherisma, 469 



Tagetes, 

 Talinum, 



426 

 137 



