INDEX. 



475 



Plucheine^, 57. 

 Plummera, 59, 237. 



floribuuda, 237. 

 Polmclidium, 207, 219. 

 Polyactis, 207, 219. 

 Polydymia, 377. 

 Polymnia, 60, 238. 



Canadensis, 238. 



Curoliniana, 213. 



perfoliata, 449. 



Ttlragonotheca, 255. 



Uvedalia, 238. 

 Polymniastrwn, 238. 

 Polupappus sericeus, 225. 

 Polypteris, 74, 337. 



callosa, 337. 



Hookeriana, 337. 



integrifolia, 337. 



integrifolia, 352. 



Texaua, 337. 

 Porophyllum, 76, 354. 



aniplexicaule, 355. 



gracile, 355. 



Greggxi, 355. 



macrocephalum, 354. 

 Prenanthes, 87, 432. 



alata, 435. 



alba, 434. 



alba, 434, 435. 



altissima, 434. 



apkylla, 436. 



aspera, 433. 



autumnalis, 433. 



Boottii, 435. 



cordata, 435. 



crepidinea, 433. 



crepidinea, 434. 



dettoidea, 435. 



exigua, 436. 



glauca, 434. 



Iltinoensis, 433. 



juncea, 435. 



Mainensis, 433. 



Miamensis, 474. 



ovata, 434. 



pauciflora, 413. 



polymorpha, 431. 



proteophylta, 434. 



pygmma, 431. 



racemosa, 433. 



Roanensis, 434. 



rubicunda, 434. 



runcinata, 413. 



sevpentaria, 434, 



simplex, 433. 



mavis, 434. 



tenuifolia, 413. 

 Prionopsu, 125. 



Cnapmanii, 174. 



ciliata, 125. 

 Proustia, 408. 

 Psacalium, 397. 

 Psathyrotes, 80, 377. 



annua, 377. 



incixa, 343. 



pilifera, 377. 



ramosissima, 377. 



scaposa, 378. 

 Pseudo-Bahia, 323. 

 Pseudo-Monolopia, 331 . 

 Psilactis, 56, 170. 



asteroides, 171. 



brevilingulata, 171. 



Coulteri, 171. 

 Psilocarpcea, 296. 



Psilocarphus, 58, 228, 448. 



brevissimus, 448. 



brevissimus, 228. 



Cbilensis, 448. 



elatior, 448. 



globiferus, (228,) 448. 



globiferus, 228. 



Oreganus, 228, 448. 

 _ tenellus, 228, 448. 

 Psilochcena, 431. 



occidentalis, 432. 

 Psilostrophe gnaphaliodes, 318. 

 Psyckotria, 21, 30. 



chimam'oides, 31. 



tanceolata, 31. 



nervosa, 31. 



oligotricha, 31. 



rufescens, 31. 



tenuifolia. 31. 



undata, 30. 

 Psychotrophum, 30. 

 Ptarmica borealis, 363. 



vulgaris, 363. 

 Pterocaulon, 57, 226. 



pycnostachyum, 226. 



virgatum, 226. 

 Pteronia Caroliniana, 109. 

 Pterophyton, 287. 

 Plilomeris, 327. 



a^Ws, 327. 



anthemoides, 328. 



aristata, 327. 



coronaria. 327. 



mutica, 328. 



tenella, 327. 

 Ptilunella scabra, 304. 

 Ptilophora, 416. 



major, 417. 



na/a»s, 417. 

 Pugiopappus, 300. 



Bigelovii, 300. 



Breweri, 300. 



calliopsideus, 300. 

 Pulicaria annua, 219. 

 Pyrethrum, 364. 



bipinnatum, 364. 



inodorum, 363. 



Parthenium, 365. 

 Pyrochceta, 170. 

 Pyrrhopappus, 87, 440. 



Carolinianus, 441. 



grandijlorus, 441. 



multicaulis, 441. 



multicaulis, 441. 



paucifiorus. 441. 



Rothrockii, 441. 



scaposus, 441. 



Sesseanus, 441. 

 Pyrrocoma arguta, 127. 



cartkammdes, 126. 



foliosa, 128. 



glomerata, 127- 



grindelioides, 125. 



Menziesii, 143. 



paniculata, 127- 



racemosa, 127. 



radiata, 126. 



Rafjnesquia, 85, 415. 



Californica, 415, 446. 



Neo-Mexicana, 415. 

 Ragweed, 248. 

 Rafllardella, 81, 380. 



argentea, 380. 



-Eiseni, 380. 



Muirii, 380. 



Pringlei, 380. 



scaposa, 380. 

 Raillardia, 380. 

 Jiaucarjua, 324. 

 Randia, 20, 28. 



aculeata, 28. 



clusiaifolia, 29. 



latifolia, 29. 



mini's, 29. 



Xalapensis, 29. 

 Iialibida columnaris, 264. 



sulcata, 264. 

 Rattlesnake-root, 433, 434. 

 Relbunium, 35. 40, 41. 



microphyllum, 41. 



polyplocum, 41. 

 Rhabdocaulis, 290. 

 Rhinaclina, 200. 

 Rhyncholepis, 227. 

 Kkhardia, 22, 32. 



jiilosa, 32. 



scabra, 32. 

 Richardsonia scabra, 32. 

 Riddellia, 71, 317. 



arachnoidea, 318. 



Cooperi, 318. 



tagetina, 317. 



RlDDELLIEiE, 71. 



Rigiopappus, 74, 338. 



leptocladus, 338. 

 Roioc, 29. 

 Rosalesia, 104. 

 Rosin-weed, 240, 241. 

 Rothia Carolinensis, 335. 

 Rubia, 35. 



Brownei, 42. 



peregrina, 42. 



tinetoria, 35. 



Walteri, 42. 

 RUBIACFJE, 19. 

 Rudbeckia, 65, 259. 



otaa, 348. 



alismcefolia, 261. 



amplexicaulis, 263. 



amplexifolia, 263. 



angustijblia, 273. 



apetala, 274. 



aristata, 259. 



aspera, 261. 



atrorubens, 259. 



bicolor, 260. 



bupleuroides, 259. 



Californica, 262. 



chrysomela, 261. 



columnaris, 264. 



digitata, 262, 264. 



discolor, 260, 261. 



fulgida, 260. 



fulgida, 261. 



glabra, 262. 



globosa, 264. 



gracilis, 260. 



grandiflora, 261 



Heliopsidis, 261. 



Heliopsidis, 261. 



heterophylla, 263. 



hirta, 260. 



hispida, 258. 



laciniata, 262. 



laevigata, 262. 



maxima, 262. 



Mohrii, 259. 



mollis, 261. 



montana, 263. 



