Opuntia, 103, 104, 105, 116, 178,| 
201, 330, 
, 299, 
Orchidaceae, 271, 323, 349. 
Orchis, 22, 153, 168, 179. 
Origanum, 152. 153. 
Ornithogalum, 14, 103, 220. 
Orobanche, 152. 
Orontium, 220, 321, 
Orthocladon, 36. 
Orthotrichum, 54, 89, 341, seqq. 
Oryzopis, 131. 
Oscillaria, 138, 182, 282. 
Oscillatoria, 112. 
Oscillatoriaceae, 112. 
Osmorrhiza, 67. 
Osmunda, 4, 5, 52, 78, > 124, 
153, 176, 209, 268, 34 7, 36 
Ostrya, 349. 
Oxalis, 337. 
Oxybathus, 67, 102. 
Oxytropis, 102. > 
Palmeae, 153. 
Palmella, 185. 
Palmerella, 80, 313. 
Palmogloea, 121, 186. 
Panicum, 49, 131, 259, 292, 360. 
Pannaria, 57, 
Papaver, 152, 153, 256, 313, 355. 
Papyrus, 297 
Pardanthus, 56. 
Parietaria, 359. 
Parkinsonia, 152. 
Parnassia, 178. 209. 
' Paronychia, 62, 67, 338. 
no 313. 
Parthenium, 67. 
Paspalum, 102. 
Passiflora, 49, 
Pastinaca, 67. 
Patellaria, 108. 
vig 125, 218, 235, 2387, 
10. 
Pavonia, 200. 
Paxillus, 76. 
Pectocarya, 130. 
Pedicularis, 56, 178, 220, 366. 
Pedinophyllum, 85, 
Pe; patina: 154. 
Pellia, 29, 30. 
Pellaes, 3, 4, 5, 6, 267, 268, 360. 
Peltandra, 
Penium, 121, 186. 
Pentstemon, 52, 104, 259, 292. 
Peridermium, 
Pestalozzia, 135. 
Petalonyx, 313. 
Petalostemon, 68, 313. 
Petunia, 113, 358. 
Peds, Ih "3 i 2 78, 107, 
ae 
Phacelin, 358. 
Phalangium, 99. 
Phalaris, 349, é 
Econo gg 42, 
Phascum 
Phaseolus, 8 86, 87, 91, 95, 103. 
Phegopteris, 2, 3, 52, 124, 268, 
Phelipaea, 14, 152, 155. 
. 
Phoradendron, ‘64. 147, 238. 
Phormidium, 138, 183, 283. 
Phragmites, 127. 
Sei ga 181, 282. 
13) 
Phyllosticta, 78, 351. 
Physalis, 14, 152, 209. 
373 
| Phytolacca, 152. 
Pilostyles, 88. 
‘| Pimpinella, 153. 
Pinguicola, 64, 126, 
Pinus, ‘ee 153, 169, 178, 310, 
382 
Pistillaria, 133. 
Pithophora, 287. 
Pithophoraceae, 281, 282, 
Placodium, 57, 
Plagiochila, 85. 
Plagiothecium, 44, 54. 
Plantagineae, 365. 
Plantago, 14, 82, 152, 155, 209, 
R 260, 324, 330, 361, 
366. 
i. Platanthera, 168 
Platanus, 148, 153, 154, 213, 237. 
Platycerium, 307. 
Plectonema, 139. 
Pleuridium, 142. 
Pleurocarpus, 140, 286. 
Pleurococcas, 139, 185. 
Pleurogyne, 366. 
Pleurotaenium, 121. 
Pluchea, 48. 
Plumiera, 64. 
Poa, 209, 238, 313, 349, 366. 
Podaxon, 308. 
‘Podophyllum, 67, 169, 
Pogonatum, 34. 
Pogonia, 192, 322, 330, 336. 
Poinciana, 64, 152 
Poinsettia, 152. 
Polanisia, ‘67, 257. 
' Polemonium, 329. 
Polycystis, 137. 
_| Polyedrium, 140. 
Polygala, 48, 116, 219, 259, 294. 
Polygonum a 115, 158, 156, 
Polyides, 111. 
Polymnia, 48, 180. 
Polyotus, 46. 
Polypodium, 3, 5, 6, 51, 52, 96, 
124, 136, 153, 175. 176, 238, 
267, 268, 276, 306, 316, 360. 
Polyporus, 107. 
Polypremum, 48. 
Polysaccum, 48. 
Polysiphonia, 110, 
Polystichum, 368. 
Polytrichum, 89, 363. 
Pontederia. 62, 170, 179. 
Populus, 208, 211, 213, 237, 238. 
Porphyra, 112. 
vice ti 86, 87, 91, 92, 257, 
Potamogeton, 156, 171, 309, 241, 
* 243, 258, 259. 
Potentilla, 67, 68, 100, 127, 219, 
313, 387, 356, 366. 
Poterium, 152, 219. 
Poterophora, 188, 
Pottia, 36, 
Prangos, 153. * 
Prasiola, 187. 
Preissia. 55, 94. 
Primula, 153, 366, 
a a = 
roserpinaca, 219, 
Protoccus, 140, 
Prunus, 15, 125,. 147, 157, 172, 
2, 235, 236,'258, 310, 339. 
Pseudoleskea, 89. 
Psichohormium, 141. 
Psilotium, 316. 
Psoralea, 67. 
Pterigynandrum, 36. 
Pteris, 2, 6, 52, 124, 158, 
275, 398, 306, 307, 312, 322, 
* 
eee 
“eae 
Ptilota, 111, 
Ptychomitrium, 36, 
Puccinia, 215, 350 
Pulicaria (Inula), 353, 
Punctaria, 110, 
Punica, 
Pylaisaea, 36. 
Pyrola, 114, 131, ge gee 
Pyrrhopappus, 48,3 
Pyrus, 131, 166, 236, ‘24, 310. 
Pyxidanthera, 274, 
Quercus, 48, 68. 79, 82, 100, 101, 
153, 175, 211, 313, “214, 215° 
235, 237, 310, "339, 349° 
Queria, 61, 
pre igo fg 
Radula, 19, 301, 
ek, 55, 96, 100, 115, 
152, 153, 187, 219, 528, 258° : 
300, 312, "3l4, 823, 355, : 
Ra istrum, "256, "354." 
Reboulia, 90. 
Reseda, 152, 156, 257, 355. 
Retama, 1 
Rhabdonia, iu. 
Rhamnus, 53, 153, 
Rhexia, 116. 
Rhinanthus, 366, 
Rhizoclonium, 141, 287. 
Rhizophora, 224, 
cate gape 52, 56, 66, 92, 
q.5 
Rhodomela, or £94. 
Rhodomelaceae, 110, 
Rhodomenia, 111, 116, 
Rhodomeniaceae, 111, 116, 
Rhopalanthus, 304 e; 
Rhossalanthus, 21, co 
Rhus, 15, 22, 47, 48, 68, 79,88, 
i 117, 4 212, 236, 
Rhynchonema, 187, 
rs 116, 156 192,250 
ium, 44, 
Rhytisma, ane 
Ribes, 92, 3388 
Riccia, 1%, 18, 46, 157, 305. 
Ricinus, 
ivularia, 138, ; 
sai 86, 211, 212, Ysa 0,304, 
Roestelia, 13. 
bows 125, 157, 212, 235. 236, 
Rhyncost 
een 152, 
Rubus, 125, anny tg 322, we 
Rudbeckia, 93. : 
Ruellia, 48, 
Rumex, mee. 
uppia, 
Rutaceae, 158. 
Sabbatia, 152, 330, 
Saccharum, 1: 
Sagedia, 59. 
Sagina, 258. 
aoeketia.t 67. 
Sali icacae, 162, 
Salicornia, 154, : 
Salix, 53, 125, 153, 154, 162, 
209, 
au, 237, 238) 
243° 
258; 310,’ 312,’313, 
. 
. 
Sanguinaria, 
Sapotaceae, ~ 
