INDEX. 



627 



Petrophytum, 170. 

 Petunia, 546. 

 Peucedanum, 267. 

 Peiicephyllam, 409. 

 Phaca, 146, 148-151 



155. 

 Phacelia, 506. 

 Phacelia, 505, 515. 

 Phceostoma, 232. 

 Phalaoroloma, 331. 

 Phalaevoseris, 423. 

 Phrliprm, 584, 585. 

 Phdlandrhim, 264. 

 Philadelphus, 202. 

 Phlox, 486. 

 Phlox, 493. 

 ' Phmnicaulis, 35. 

 Pholisma, 464. 

 Phot in ia, 188. 

 PhiiUodoce, 456. 

 Phi/Hopappus, 423. 

 Physalis, 540. 

 Physaria, 47. 

 Pickeringia, 114. 

 Picradenia, 394. 

 Picrotliamnus, 404. 

 Pilocereus, 247. 

 Pimpernel, 469. 

 Pimpinella, 259. 

 Pin-clover, 95. 

 Pin-grass, 95. 

 Piue-sap, 462. 

 Piuedrops, 461. 

 Pinguicula, 586. 

 Pipsissewa, 459. 

 Piptoealyx, 527. 

 Pirus, 188. 

 Pistacia, 109. 

 PUavia, 98. 

 Plagiobothrys, 526. 

 Plantagixace^, 610. 

 Plantago, 610. 

 Plantain, 610. 

 Platopuntia, 248. 

 Platycarpos, 124. 

 Platyspermum, 27. 

 Platystemon, 19. 

 Platystignia, 20. 

 Plectritis, 287. 

 Pleuricospora, 463. 

 Pleiirogyne, 478. 

 Pluchea, 334. 

 Plum, 166. 



PLUMBAGINAGEiE, 465. 



Pneumonanthe, 481. 

 Podosciadium, 263. 

 Pogogyne, 596. 

 Poison Hemlock, 258. 

 Poison Oak, 110. 

 Polanisia, 50. 



POLEMONIACE^, 485. 



Polemoniuni, 499. 

 Polycarpon, 71. 

 Polygala, 58. 



POLYGALACE-E, 58. 



Polypap2>us, 334. 

 PoME«, 166. 

 Pond-Lily, 17. 



Porophvllum, 398. 

 Purtcrella, 444. 

 Portulaea, 73. 



PoRTlTI.A(ACE.E, 73. 



Potato, 558. 

 Potentilla, 177. 

 Potcntilla, 181, 184. 

 Poteridium, 186. 

 Poterium, 186. 

 Prenanthcs, 428. 

 Primrose, 468. 

 Primula, 468. 

 Primulace^, 466. 

 Prince's Pine, 459. 

 Prosopis, 162. 

 Prunus, 166. 

 Psathyrotes, 409. 

 Psilocarphus, 336. 

 Psilocarphus, 337. 

 Psiloclienia, 435. 

 Psoralea, 139. 

 Ptelea, 97. 

 Pterospora, 461. 

 Pterostephanus, 431. 

 Pt.ilocalijx, 520. 

 Ptiloraeris, 378. 

 Ptilophora, 423. 

 Puccoon, 522. 

 Pugiopappus, 354. 

 Pidmonaria, 523. 

 Pulsatilla, 3. 

 Purshia, 173. 

 Purslane, 73. 

 Pycnanthemum, 592. 

 Pyrola, 460. 

 Pijrola, 459, 460. 

 Pyrrocoma, 311, 312, 



315. 

 Radish, 49. 

 Rafinesquia, 429. 

 Ragweed, 344. 

 RaillardLdla, 416, 618. 



RANUNCULACEiE, 2. 



Ranunculus, 5. 

 Raphanus, 49. 

 Raspberry, 171. 

 Rattleweed, 144. 

 Red-bud, 160. 

 Red Clover, 128. 

 Redwood, 104. 

 Relbunium, 283. 

 Reseda, 53. 

 resedace.e, 53. 

 Rhamnace^, 99. 

 Rhamnus, 100. 

 Rhododendron, 457. 

 Rhus, 109. 

 Rhyncholepis, 435. 

 Ribesia, 206, 

 Ribes, 204. 

 Ribgrass, 610. 

 Riddelia, 372. 

 Rigiopappus, 387. 

 Robsonia, 204. 

 IJomanzoffia, 516. 

 Romneva, 20. 

 Rosa, 187. 

 Rosacea, 164. 



Rose, 187. 

 Rose Bay, 458. 

 Rosinweed, 361. 

 RUI!IACE/E, 281. 

 Rubus, 171. 

 Rudbeckia, 347. 

 Ruellia, 588. 

 RUTACE,^, 96. 

 llutosmn, 97. 

 Scu-cularia, 551. 

 Sage, 598. 

 Sage-bush, 402. 

 Sagina, 70. 

 St. John's-wort, 80. 

 Salal, 454. 

 Salazaria, 604. 

 Salmon-berry, 171. 

 Salpiqlossis, 546. 

 Salsify, 422. 

 Salvia, 598. 

 Sambucus, 277. 

 Samolus, 470. 

 Sand-Spurrey, 71. 

 Sandwort, 68.. 

 Sa)i(/if,isorb(/, 186. 

 Sanicle, 255. 

 Sanieula, 255. 

 Sanfolma, 401. 

 Sai'INDACe.e, 10.5. 

 Saracha, 540, 541. 

 Sarcodes, 462. 

 Sareostemma, 477. 

 Saiikaceniace^e, 17. 

 Saxifrnga, 192. 

 Siunfraga, 196. 

 Saxifiiagace.e, 192. 

 Saxifrage, 192. 

 Schinus, 109. 

 Schhocarya, 234. 

 Schizonotus, 477. 

 Sclerocarpm, 360. 

 Scorpion-Grass, 522. 

 Scorzonella, 424. 

 Screw-bean, 162. 

 Screw-pod Mesquite, 



163. 

 Scrophularia, 552. 

 Scrophulariace-e, 



546. 

 Scutellaria, 602. 

 Sea-Milkwort, 469. 

 Sea-Purslane, 251. 

 Seduni, 209. 

 Scdum, 211, 212. 

 Self-heal, 604. 

 Sclinum, 264. 

 Scliiium,^ 266. 

 Senipcrvivum, 208. 

 Senebicra, 48. 

 SeiK'cio, 410, 618. 

 Senccio, 434. 

 Senna, 161. 

 Sericocaj-pus, 31 9. 

 Scricoiiraphis, 489. 

 Scriiihidium, 405. 

 Service-berry, 189. 

 SescU,^ 268. 

 Sesuvium, 251. 



Shepherd's Purse, 44. 

 S/u>rtiu, 378. 

 Sibbaldia, 180. 

 Sida, 86. 

 ,yWa, 83, 84, 87. 

 Sidalcea, 83. 

 Sicvcrsia, 176. 

 Silene, 62. 

 Silybum, 421. 

 Silicweed, 474. 

 Simsia, 351. 

 Sinapis, 39. 

 Siphoualyx, 207. 

 Siphonel'la, 492. 

 Sisymbrium, 40. 

 Sium, 261. 

 Si am, 260. 

 Skullcap, 602. 

 Small Manzanita, 453. 

 Smelowskia, 42. 

 Stnelowskia, 41. 

 Snapdragon, 548. 

 Sneeze-weed, 392. 

 Snow- Plant, 462. 

 Snowberry, 279. 

 Snowbush, 103. 

 Solanace.e, 537. 

 Solanum, 538. 

 Solanum, 538. 

 Solidago, 318. 

 Solidngo, 314. 

 Soliva,' 406. 

 Soiichus, 442. 

 Sonchus, 442. 

 Sophora, 114. 

 Sorbus, 189. 

 Sow-Thistle, 442. 

 Spanish Needles, 357. 

 Spearmint, 592. 

 Specularia, 442. 

 Speedwell, 572. 

 Spergula, 70. 

 Spergula, 70. 

 S2)ergularia, 71. 

 Sphacele, 598. 

 Sphcvnosciadium, 265. 

 Sphseralcea, 86. 

 Spliceralcca, 87. 

 Sphccromeria, 617. 

 Sphffirostigma, 225. 

 Spikenard, 273. 

 Spilanthes, 397. 

 Spindle-tree, 98. 

 Spira;a, 169. 

 Spircca, 171. 

 Spraguea, 77. 

 Stachvs, 605. 

 Stank'va, 38. 

 Staplivlca, 108. 

 Star-Hower, 468. 

 Star-Thistle, 421. 

 Statice, 465. 

 Stat ice, 465. 

 Sfrgnocarpics, 520. 

 Stellaria, 67^ 

 Stemodia, 570. 

 Slenacti.s, 330, 331. 

 Stcnolm, 311. 



