Nasturtium, 132, 223, 267, 268, 321, 341+ 
Navicula, 131, 146. 
Neckera, 165, 348. 
Neckeria, 265. 
Nectria, 94, 276. 
Neea, 294. 
Negundo, 158, 289. 
Nemacladus, 311. 
Nemopanthes, 213. 
Nemophila, 326. 
Nemoseris, 308. 
Neopringlea, 310. 
Nepeta, 272. 
Nephradenia, 294. 
Nephrodium, too, 311. 
Neptunia, 377. 
Nicotiana, 45, 97. 
Nidularium, 309. 
Nipa, 218. 
Nitella, 21, 166. 
Nitzschia, 131. 
Nolana, 46. 
Nolina, 97. 
Norna, 258. 
Nostoc, 144. 
Notholzna, 97, 349- 
Nuphar, 128, 228, 290. 
Nuttallia, 308. 
Nympheza, 67, 121, 128, 283. 
Nyssa, 33, 216. 
Oakesia, 1, 272. 
pepe storage 95- 
nothera, 190. 256, 323, 342, 344) 348- 
Oigentandia. 407. Pug Sm os 
Oligonema, 310, 315- 
Oligotrichum, 49. 
Omphalodes, 172, 311. 
Onoclea, 16, 76, 222. 
Ophiobolus, 94. 
Ophioglossum, 124, 152. 
Opuntia, 36, 279, 293- 
Orchidium, 258. 
Orchis, 189. 
Orcuttia, 224. 
Oreas, 24. 
Oreomyrrhis, 37. 
Oreopanax, 38, 294. 
Oreosciadium, 37. 
Origanum, 313. 
Orobanche, 211, 274. 
Orontium, 193. 
Orthza, 93. 
Orthocarpus, 317, 326. 
Orthotrichum, 165. 
Osmaronia, 308. 
Osmorhiza, 170, 193. 
unda, 74, 91, 276. 
Osteocarpus, 42. 
Otacanthus, 31. 
Otopappus, 311. 
Ourouparia, 38. 
Oxalis, 47, 97, 190, 197. 278. 
Oxycoccus, 255. 
-Oxydendrum, 187. 
Oxypolis, 367- 
Oxypospermum, 18. 
Oxytropis, 287. 
Pachystima 24; 
Pzxonia, 248. 
ee Pzpalanthus, gst. 
: I. 
ylon, I 
: satcoasen 278. 
210. 
- Panicum, 97, 123, 187, 196, 223. 
a 
| Paronychia, iB 
xi 
Parthenium, 187, 225, 302. 
Paspalum, 188, 196, 278, 287. 
Passiflora, 99, 133, 186 
Pastinaca. 291, 371- 
Patosia, 18. 
Paullinia, 290. 
Pedicularis, 66, 172. 
Pellia, 75. 
Peltandra, 193. 
Penthorum, 344. 
Pentstemon, 96, 188, 326, 343, 348, 376, 378. 
Perezia. 286. 
Perityle, 287. 
Peronospora, 161, 163, 225, 290, 292, 348. 
Persea, 289. 
Poguatacena, 95. 
Pestalozzia, 215, 290. 
Petalostemon, 196. 
Petasites, 205. 
Petunia, 246. 
Peucedanum, 170. 
Peziza, 214, 288. 
Phaca, 46. 
Phacelia, 172, 316, 326, 377) 378+ 
Phalaris, 132, 196, 223. 
Phallus, 226. 
Phascum, 50. 
Phaseolus, 83, 251. 
Philadelphus, 348. 
Philonotis, 348. 
Phleum, 132, 173, 223, 292- 
Phlox, 88, 166, 170, 189, 325- 
Phoma, 67, 95, 393- 
Phragmidium, 172. 
Phryma, 344. 
Phyllactinia, 282. 
Phyllactis, 263. 
Phyllophora, 339. 
Phyllosticta, 67, 157, 279, 302, 374- 
Phymatomospheria, 304. 
Physalis, 278. 
Physalosphora, 94. 
Physarum, 93. 
Ph us, 342. 
Physcomitrella, 24. 
Physcomitrium, 24.. 
Physophycus, 346. 
Physostigma, 287. 
Phyteuma, 11. 
Phytopthora, 225, 292. 
Picea, 172, 378. 
Pickeringia, 308. 
Pilea, 193. 
Pilochata, 224. 
Pilotrichella, 348. 
Pimpinella, 311. 
Pinguicula, 349. 
Pintoa, 40. 
Pinus, 31, 149, 164, 172, 197; 2949 310, 313, 315+ 
Piper, 06. 
Piperomia, 96. 
Piscidia, 286. 
Pisonia, 294. 
| Pitcairnia, 192, 225- 
Plagiobocurys, 326: 
giobothrys, 
Plagiochila, 215. 
Plantago, 121, 132, 214, 223, 226, 318. 
Plasmophora, 163, 225. 
Platystemon, 71, 319. _ 
Pleospora, 94. : 
Pleurocapsa, 335. 
Pleuropogon, 376. 
Pleurosigma, 12, 157. 
Pleurothallis, 378. 
Plowrightia, 95, 225. 
Pluchea, 192, 253- 
} 
a P 106. 
| Poa, 1 06, 22: 7 ae 
P 24, ao 
] 
Podopterus, 197. 
Podosphzra, 162, 282, 
