* 
Vili 
CEnothera, 46, 187, 274. 
‘Olpidium, 410. 
Olpitrichum, 3:4. 
Omphalea, 182. 
Onoclea, 413. 
Onychonema, 286, 29t. 
Ophiodothis, 223, 224. . 
Ophioglossum, 254, 255, 256. 
Opuntia, 500. 
Orechznactis, 46. 
Orobus, 444, 448, 449+ 450, 453, 454, 456, 457- 
Orthotrichum, 1, 65, 68, 70, 134, 137, 184, 267, 273, 
352, 527- 
Oryza, 535- 
Osmunda, 537- 
Ostrya, 185. 
Oxalis, 471, 472) 473, 474, 475, 531- 
Pachira, 237. 
Pzonia, 410. 
Paliurus, 57, 64. 
Panicularia, 37, 136. 
Panicum, 22, 129. 
Pannaria, 391» 393- 
Parmelia, 390. . 
Paspalum, 127, 225. 
Passiflora, 383. 
Patellaria, 394- 
Pecopteris, 270, 493- 
Pellia, 489 
Peltandra, 311, 312. 
Peltanthera, g9. 
‘Peltigera, 391. 
Pentarhaphia, 135. 
aresvou £5» a 135, 304, 501. 
‘eperomia, 160, 161, 274. 
Peramium, 496. 
Periandra, sor. 
Peromnion, 381. 
Pertusaria, 392- 
Petalostemon, 314. 
Petunia, 274, 417. 
Peziza, 464. 
Phacelia, 46,272, 303, 304. 
Phenix, 237. 
Phascum, 3433 347» 349» 357, 352, 362, 363, 372. 
Phragmicoma, 383, 465. 
— ites, 63. 
Phyllites, 59, ee 256, 468. 
Phyllocactus, 501. 
Phyllogonum, 46. 
Phyllosticta, 187. 
Seer 485. 
ee Physconieinta, 189, 529- 
_ Phytelephas, 466. 
Picea, 27, 28, 69. 
_ Pilobolus, 185. 
Pilocarpus, 537- 
Pinus, 62, 90, 187, 316, 413, 501, 536. 
Piper, 161, 274- : 
Pisum, 445, 459. 
Placodium, 39. - 
Plagiochila, 489. 
Plagiothecinm, 268. 
; tago, 129. 
Pusmastionioitl 76, 78, 186. 
Platanus, 59, 499, 469, 470. 
Pleodorina, 383, 461, 464. 
Pleuridium, 344, 348, 372- 
Eacken, 133+ 265, 266, 483, 484. 
Beatie 13+ 228, 317. 
pemcae etn ee 
Polanisia, 47, 235, 236. 
Polycystis, 128, 185. 
Polygonum, 31, 89, 168, 234, 317, 476. 
Polypodium, 408, 499. 
Polytrichum, 266. 
Pontederia, 130. 
Populus, 46, 63, 233, 380, 413 465- 
Porella, 489. 
Porotrichum, 381. 
Portulaca, 130. 
Potamogeton, 235, 243, 276. 
Potentilla, 31, 79, 80 
Pottia, 267. 
Preissia, 459, 536. 
Preissites, 458. 
Prionodon, 381. 
Protzoides, 52, 64. 
Protococcus, 418. 
Proustia, 487. 
Prunus, 188, 237, 301, 373, 461. 
Psoralea, g1, 238. 
Pterobryum, 185. 
Pterophyllum, 62. 
Ptychanthus, 383, 465. 
Ptychomitrium, 497- 
Puccinia, 40, 41, 135,416, 535. 
Pycnanthemum, 25, 40. 
Pylaisia, 268. 
Pyramidula, 189, 206. 
Pyrenula, 395, 396- 
Pyrocoma, 236, 274. 
Pythium, 413. 
» 786. 
Quercus, 158, 233, 236, 275, 464, 528, 536. 
Radula, 489. 
Ramalia, 389, 399- 
Ramona, 381. 
Ranunculus, 22, 41, 42, 134, 188, 236, 272- 
Rapa, 77. 
Raphanus, 77- 
Raumeria, 233- 
Ravenalia, 235. 
Rhamunus, 58, 64, 184, 233- 
Rheum, 490. 
Rhipogonum, 419. 
Rhipsalis, R. 
on, 496- 
Rhus, 188, 486, 487- 
Sneed 275: 8 
iccia, 384, 489, 533- 
Richardia, 318, 462. 
Robinia, 275, 464. 
Rosa, 416. 
Rubus, 19, 120, 265. 
Sabbatia, 24- 
S ie wea ae 
alix, 50, 63, 04, 05, 274- 
Salsola, 382. . 
Salvia, 133, 499- 
Salvinia, 253, 316. 
Sambucus, 186. 
Sapindus, 57, 64. 
Sapotacites, 62. 
Saprolegnia, 464. 
Sapromyces, 136. 
Sarracenia, 48. 
Sassafras, 
. 
Scirpus, 29, 30, 34, a5: 
Scleria, 176. 
