nolens Nyl. (Pertusaria) 508
NORMANDINA Nyl. ii. 272
notila S. P. Gray (Alyxoria) ii. 240
notha Aoh. (Opegrapha) ii. 240
nothiza Nyl. (Opegrapha) ii. 236
nothus Aoh. (Lichen) ii. 240
Nylanderi Hepp (Sagedia) ii. 298
Nylanderi Krempelh. (Thelid.) ii. 298
Nylanderiana Mass. (Lecania) 448
Nylanderiana Nyl. (Leoanora) 448
oblongans Nyl. (Collemopsis) 79
OBRYZUM Wallr. ii. 265
obscura Mudd (Borrera) 318
obscura Pers. (Opegrapha) ii. 350
obscura Nyl. (Physcia) 318
obsczira Tayl. (Verrucaria) ii. 259
obscurata Schær. (Lccidea) ii. 197
ohscuratum Massal. (Rhizocarpon) ii.
196
obsourum A. L. Sm. (Myeoporellum)
ii. 350
ohscurum Almqu. (Mycoporum) ii. 350
ohscurus Ehrh. (Lichen) 318
obscurus Sm. (Lichen) ii. 258
obscurus With. (Lichen) 310
obsoleta Nyl. (Lecidea) ii. 97
obturbans A. L. Sm. (Biatorin.) ii. 131
obturbans Nyl. (Lecidea) ii. 131
occulta Koerb. (Buellia) ii. 167
occulta Leight. (Lecidea) ii. 167
ocellata Koerb. (Btiellia) ii. 172
ocellata Floerke (Lecidea) ii. 172
ochracea Duf. (Arthonia) ii. 211
ochracea Mudd (Aspieilia) 478
ocliracea Hepp (Biatora) ii. 41
ochracea Nyl. (Leoanora) 375
ochracea Wedd. (Lecidea) ii. 41
ochracea Schær. (Lecidea) 375
ochraceum Mudd (Callopisma) 375
ochrocheila Nyl. (Opegrapha) ii. 232
ochrochlora Floerke (Cladonia) 142
ochrococca Nyl. (Lecidea) ii. 36
ochroleuca Nyl. (Alectoria) 208
ochroleuca Hook. (Gorniczdaria) 208
ochroleicczts Ehrh. (Lichen) 208
ochroleucus With. (Lichen) 210
ochrophora Th. Fr. (Biatorella) ii. 107
ochrophora Nyl. (Lecidea) ii. 108
ochrostoma Borr. (Sagedia) ii. 284
ochrostoma Mudd (Verrucaria) ii. 284
ochrothalamia Nyl. (Melasp.) ii. 227
oculata Ach. (Leoanora) 465
oculata Gray (Binodina) 465
oculatum Turn. & Borr. (Isidium) 465
oculatzts Dicks. (Lichen) 465
oculatus E. Bot. 1.1833 (Lichen) 493
odontella Ach. (Cetraria) 219
odontellus Ach. (Lichen) 219
OEderi Tayl. (Lecidea) 476
OEderi Ach. (Lecidea) ii. 188
OEderi Neh. (Lichen) ii. 188
OEderi E. Bot. t. 1117 (Lichen) 476
CEderi Koerb. (Rhizocarpon) ii. 187
olivácea Mudd (Arthopyrenia) ii. 337
oUvacea Ach. (Parmelia) 251
olivácea Gray (Parmelia) 251
olivácea A. L. Sm. (Porina) ii. 337
olivacea Pers. (Verrucaria) ii. 337
olivaceum, scutellis etc. Dill. (Lichenoides)
251, 252, 254
olivaceus Huds. (Lichen) 251
olivetorum Nyl. (Parmelia) 234
omphalodes Linn. (Lichen) 243
omphalodes Ach, (Parmelia) 243
OPEGRAPHA Humb. ii. 229
ophthalmiza Nyl. (Pertusaria) 496
oreina Ach. (Lecanora) ii. 352
oreina Wainio (Binodina) ii. 352
oribata Nyl. (Lecidea) ii. 160
orosthea Aoh. (Lecanora) 429
orosthea Gray (Lecidea) 429
orostheus Ach. (Lichen) 429
orostheus E. Bot. 1.1549 (Lichen) 432
orphnæilla Stirton (Lecidea) ii. 93
ostreata Schær. (Lecidea) ii. 14
ostreata Hofim. (Psora) ii. 14
ovata Deak. (Verrucaria) ii. 286
oxyspora Mudd (Arthopyrenia) ii. 330
oxyspora Nyl. (Lecidea) ii. 103
oxysporus Ivi. (Abrothallus) ii. 103
pachycarpa Fr. (Biatora) ii. 198
pachycarpa Massal. (Bomby.) ii. 198
pachycarpa Duf. (Lecidea) ii. 198
pallescens Nyl. (Lecanora) 462
pallescens With. (Lichen) 423
pallescens Linn. (Lichen) 463
pallida Pr. (Coniocybe) 100
pallida Nyl. (Verrticaria) ii. 275
pallidum Pers. (Calicium) 100
pallidum Mudd (Dermatocarp.) ii. 275
pallidum Ach. (Endocarpon) ii. 275
pallidus Dicks. (Lichen) 417
pallidus Sm. (Lichen) ii. 275
palmatum Sm. (Collema) 73
palmatum Mont. (Leptogium) 73
palmatum Gray (Scytenium) 73
palmatus Huds. (Lichen) 73
pammicta Stirton (Lecidea) ii. 89
panæola Ach. (Lecidea) ii. 65
PANNARIADel. 335
pannariellum Nyl. (Pterygium) 34
PANNULARIA Nyl. 340
papillaria Tayl. (Cenomyce) 124
papillaria Mudd (Cladonia) 124
papillaria Ehrh. (Lichen) 124
papillaria Duf. (Pycnothelia) 124
papillosa Ach. (Verrucaria) ii. 283
papulare Arn. (Thelidium) ii. 298
pa,ptilaris Fr. (Verrucaria) ii. 299
paradoxum Turn. & Borr, (Isidium)
500
paradoxum Born. (Spilonema) 20
paralia Nyl. (Arthonia) ii. 218
parallela Fr. (Stictis) ii. 223
parallela Fr. (Xylographa) ii. 223
parallelus Ach. (Lichen) ii. 223
parasema Ach. (Lecidea) ii. 51
parasemoides Nyl. (Arthonia) ii. 219
parasemus Ach. (Lichen) ii. 51
parasemus Sm. (Lichen) ii. 52
parasitica Tayl. (Cenomyce) 160
parasitica Floerke (Lecidea) ii. 185
parasitica Massal. (Leciogr.) ii, 185
parasiticus Sm. (Lichen) ii. 184
parasiticus Sm. (Scyphophorus) 160
paraxanthodes Nyl. (Opegr.) ii. 238
parella Ach. (Lecanora) 461
parella Gray (Binodina) 461
parellaria Nyl. (Lecidea) ii. 186
Xmrellus Lìnn. (Lichen) 461
parietina Gray (Parmelia) 297
parietina De Not. (Physoia) 297
parietinum Ach. (Calicium) 95
giarietinus Linn. (Lichen) 297
parile Gray (Nephroma) 284
parile Nyl. (Nephromium) 284
parilis Ach. (Lichen) 284
Parisiensis Nyl. (Lecanora) 412
parissima Nyl. (Lecidea) ii. 122
PARMELIA Ach. 232
Parmeliarum Oliv. (Buellia) ii. 183
Parmeliarum Sommerf. (Lecid.) ii. 183
PARMELIOPSIS Nyl. 262
PARMOSTICTA Nyl. 274
particularis A. L. Sm. (Buellia) ii. 184
particularis Nyl. (Lecidea) ii. 184
parum, etc. Dill. (Coralloides) 132
parva Deakin (Verrucaria) ii. 294
parvum virescens, etc. Dill. (Lichenoides)
279
paschale Fr. (Stereocaulon) 118
paschale Gray (Stereocaulon) 117
paschalis Huds. (Lichen) 117
paschalis Linn. (Lichen) 118
patellulata Nyl. (Arthonia) ii. 217
Patersoni Stirton (Melasp.) ii. 229
ptatula Leight. (Verruxaria) ii. 292
paucula Nyl. (Lecidea) ii. 43
pedatula Nyl. (Lecidea) ii. 97
pelidna Ach. (Lecidea) ii. 162
pelidniza Nyl. (Lecidea) ii. 163
peliocypha Nyl. (Lecanora) 483
pteliocypha Wahl. (Parmelia) 483
peliscypha Cromb. (Lecanora) 484
pellita Aoh. (Gyrophora) 334
pellitus E. Bot. t. 931 (Lichen) 334
pellucida Ach. (Peltidea) 291
pelobotrya Mudd (Aspieilia) 469
pelobotrya Somm. (Lecanora) 469
pelobotrya Gromb. (Lecidea) 469
pelobotryon Wahl. (Urceolaria) 469
peloolita Nyl. (Verrucaria) ii. 288
peltatum arboreum etc. Dill. (Lichenoides)
272
peltattim terrestre etc. Dill. (Lichenoides)
287, 289
PELTIDEA Ach. 277
PELTIGERA Hoffm. 286
peltigera Th. Pr. (Arthonia) ii. 219
peltophora A. L. Sm. (Polyblastia)
ii. 306
peltophora Stirton (Verrucar.) ii. 306
peralbella Nyl. (Lecanora) 419
percaenoides Nyl. (Lecanora) 482
percontigua Nyl. (Lecidea) ii. 68
perforata Ach. (Parmelia) 235
perforata Sm. (Parmelia) 234
perforatum, etc. Dill. (Coralloides) 178,
179, 155
perforatus E. Bot. t. 2423 (Lichen) 234
perforatus Wulf. (Lichen) 235
periclea Sm. (Lecanora) 395
periclea Nyl. (Platygrapha) ii. 204
periclea Gray (Binodina) 395
pericleus Ach, (Lichen) ii. 204
pericleus E. Bot. 1.1850 (Lichen) 395