INDEX. 



475 



PlucheinEvE, 57. 

 Plunimera, 5!), 2^17. 



floribiinda, 237. 

 Pohjaclidium, 207, 219. 

 Polyactis, 207, 219. 

 Polijdymia, 377. 

 Polvmnia, 60, 238. 



" Canadensis, 238. 



Caroliniiina, 213. 



perfoliata, 41"J. 

 Tetragonul/nca, 255. 



Uvedalia, 238. 

 Polymniastrum. 238. 

 Pohjpappus scriceus, 225. 

 Poh'pteris, 74, 337. 



callosa, 337. 



Hookeriana, 337. 



integrifolia, 337. 



inieyrifolia, 352. 



Texana. 337. 

 Porophyllum, 76, 354. 



aniplexicaule, 355. 



gracile, 355. 



Gve<j(jii, 355. 



macrocephalum, 354. 

 Prenanthes, 87, 432. 



alata, 435. 



alba, 434. 



albn, 434, 435. 



altissima, 434. 



aphylla, 436. 



aspera, 433. 



autumnnlis, 433. 



Boottii, 435. 



cordnta, 435. 



crepidinea, 433. 



crepidinea, 434. 



deltoidea, 435. 



exi(jua, 436. 



fflauca, 434. 



lUinoensis, 433. 



juncea, 435. 



Mainensis, 433. 



Miamensis, 474. 



ovnta, 434. 



paucijlora, 413. 



pobjmorpha, 431. 



j)roteophyUa, 434. 



pygmcen, 431. 



raceniosa, 433. 



Roanensis, 434. 



I'ubicunda, 434. 



runcinnta, 413. 



serpentaria, 434. 



simplex, 433. 



suavis, 434. 



tenuifolln, 413. 

 Prionopsis, 125. 



Chapmanii, 174. 



cilinta, 125. 

 Prmistia, 408. 

 Psacalium, 397. 

 Psathyrotes, 80, 377. 



annua, 377. 



incim, 343. 



pilifera, 377. 



raniosissima, 377. 



scaposa, 378. 

 Pseudo-Bahia, 323. 

 Pseudo-3fonolopia, 331 . 

 Psilactis, 56, 170. 



asteroides, 171. 



brevilingulata, 171. 



Coulteri, 171. 

 Psilocarpcea, 296. 



Psilocarphus. 58, 228, 448. 



brevissimii.s, 448. 



brevissimus, 228. 



Chilensis, 448. 



elatior, 448. 



globifenis, (228,) 448. 



ylobi/'erus, 228. 



Oreganiis, 228, 448. 



tcnellus, 228, 448. 

 Psilochcena, 431. 



occidentalis, 432. 

 Psiloslropke (jnaphaiiudes, 318. 

 Psychotria, 21, 30. 



chimarroides, 31. 



lanceolaia, 31. 



nervosa, 31. 



oligof.richa, 31. 



rufescens, 31. 



tenuifolia, 31. 



inidata, 30. 

 Psychotropihum, 30. 

 Planiiica borealis, 363. 



vulfjitris, 303. 

 Pterocaulon, 57, 226. 



pycnostachyuni, 226. 



virgatum, 226. 

 Pteronia Caroliniana, 109. 

 rterophyton, 287. 

 PiUomeris. 327. 



affinis, 327. 



anthemoides, 328. 



arislaia, 327. 



coronaria. 327. 



viutica, 328. 



<Mie//rt, 327. 

 Ptilonella scabra, 304. 

 PtilojjJiom, 416. 



major, 417. 



nuinns, 417. 

 Pugiop'tppiis, 300. 



Bi/jetovii, 300. 



Breweri, 300. 



calliopsideiis, 300. 

 PuUcaria annua, 219. 

 Pyrethrum, 364. 



b/pinnatum, 364. 



inodorum, 303. 



Parthenium, 365. 

 PyrocJuetn, 170. 

 Pyrrhopappus, 87, 440. 



Carolinianus, 441. 



grandiflorus, 441. 



multicaulis, 441. 



multicaidis, 441. 



pauciflorus. 441. 



Kothi-ockii, 441. 



scaposus, 441. 



Sesseanus, 441. 

 Pyrrocoma m-f/vta, 127. 



carthani'iides, 126. 

 fol'wsa, 128. 



(jlomerata, 127. 



(jrinilelioidcs, 125. 



'Mcnziisii, 143. 



paniculatn, 127. 



raceniosa, 127. 



radiata, 126. 



Rafinesquia, 85, 415. 



Califovnioa, 415, 446. 



Neo-Mexicana, 415. 

 Ragweed, 248. 

 Kaillardclla, 81. 380. 



argentea, 380. 



/ijicnj, 380. 



Muirii, 380. 



Pringlei, 380. 



scaposa, 380. 

 Raillnrdia, 380. 

 Rancaqua, 324. 

 Kandia, 20, 28. 



aculeata, 28. 



clnsicefolia, 29. 



latifoUn, 29. 



wi('i/s, 29. 



Xalapensis, 29. 

 Ralibida columnaris, 264. 



sulcata, 264. 

 Rattlusnake-root, 433, 434. 

 Relbimium,3b, 40, 41. 



microphyllum, 41. 



polyplocum, 41. 

 Rhabdocaidis, 290. 

 Rhinactina, 200. 

 Rhyncholepis, 227. 

 Richardia, 22, 32. 



pilosa, 32. 



scabra, 32. 

 Richardsiinid sc'ibra, 32. 

 Kiddellia, 71, 317. 



arachnoidea, 318. 



Cooperi, 318. 



tagetina, 317. 



RiDDELLIE.E, 71. 



Rigiopappus, 74, 338. 



leptocladiis, 338. 

 Roioc, 29. 

 Rosrdesia, 104. 

 Rosin-weed, 240, 241. 

 Rothia Carolinensis, 335. 

 Rubia, 35. 



Brownei, 42. 



pererjrina, 42. 



tinctoria, 35. 



Widteri, 42. 

 RUBIACE^E, 19. 

 Rudbeckia, 05, 259. 



o/rt<rt, 348. 



alismaifolia, 261. 



amplexicaulis, 263. 



amplexifolia, 263. 



nnf/ustijolia, 273. 



apetala, 274. 



aristata, 259. 



aspera, 201. 



atrorubens, 259. 



hicolor, 260. 



bupleuroides, 259. 



Californica, 262. 



chrysomela, 261. 



columnaris, 264. 



dUjitata, 262, 264. 



discolor, 260, 261. 



fulgida, 200. 



fidnida, 201. 



5r?r('6rrt,262. 



ylobosa, 204. 



gracilis, 200. 



grandiflora, 261 



Heliopsidis, 201. 



Heliopsidis, 261. 



heterophylla, 263. 



hirta, 260. 



hispida, 258. 



laciniata, 262. 



laevigata, 202. 



maxima, 262. 



Muhrii, 259. 



mollis, 261. 



montana, 263. 



