302 
Menziesii, Tayl. (Sticta), 194. 
Michauaii, Ach. (Parmelia), 220. 
Micrococea, Born. (Synalissa), 269, 270. 
Microphylla, Ach. (Lecidea), 256. 
Microphyllum, Ach. (Collema), 276. 
Mollusca, Ach. (Dufourea), 141. 
Mollusca, Ach. (Roccella), 141. 
Molybdeea, Pers. (Coccocarpia), 257, 258. 
Moniliformis, Bab. (Parmelia), 220. 
Montagnei, Bél. (Roccella), 138, 140, 141. 
Mihlenbergii, Ach. (Umbilicaria), 184. 
Multifida, Sch. (Parmelia), 233, 272, 273. 
Multifidum, Sch. (Collema), 272, 273. 
Multifidus, Dicks. (Lichen), 234. 
Multiflorum, Scher. (Collema), 274. 
Multipartitum, Sm. (Collema), 276. 
Muralis, Scheer. (Parmelia), 260. 
Murorum, DC. (Placodium), 262, 265, 266. 
Muscigena, Ach. (Physcia), 249. 
Muscorum, Ach. (Pannaria), 256. 
Mutabilis, Tayl. (Parmelia), 116, 219. 
Myochroa, Scher. (Parmelia), 279. 
Nigrescens, Ach. (Collema), 276. 
Nigrescens, Ach. (Parmelia), 276. 
Nitida, Tayl. (Sticta), 196. 
Nivale, L. (Platysma), 136, 137, 177, 178, 179, 180. 
Obscura, Fr. (Physcia), 245, 247, 248, 249. 
Obscuroides, Linds. (Lecidea), 112, 247. 
Obyvoluta, Ach. (Sticta), 191, 192, 197. 
Olivacea, Ach. (Parmelia), 206, 233, 235, 236. 
Olivaceum, Hook. (Collema), 279. 
Omphalodes, Fr. (Parmelia), 115, 185, 195, 206, 226, 
229. 
Orygmea, Ach. (Sticta), 191, 192, 199. 
Oxyspora, Tul. (Lecidea), 163, 204, 232, 233. 
Pallida, Hook. fils (Sticta), 192, 201. 
Pannosa, Del. (Pannaria), 256. 
Papillaria, Hoffm. (Cladonia), 111, 161, 164. 
Papulosa, Ach. (Umbilicaria), 183, 184. 
Parietina, L. (Physcia), 239, 250, 252, 253, 254, 265, 
266. 
Parmelioides, Hook. (Lecidea), 258. 
Paschale, Fr. (Stereocaulon), 152, 153. 
Pellita, Ach. (Gyrophora), 184. 
Pennsylvanica, Ach. (Umbilicaria), 183, 184. 
Perforata, Ach. (Parmelia), 112, 116, 202, 203, 206, 
208, 209, 210, 211, 212, 213, 214, 215, 219, 230, 
277. 
Perlata, Ach. (Parmelia), 116, 180, 202, 206, 208, 209, 
210, 211, 212, 213, 215, 216, 218, 219, 
Pertusa, Sch. (Parmelia), 225, 226. 
Phycopsis, Ach. (Roccella), 138, 141. 
Phyllocarpum, Pers. (Leptogium), 277, 279. 
Physodes, Ach. (Parmelia), 116, 122, 123, 135, 136, 
138, 206, 207, 213, 214, 218, 219, 220, 299, 204, 
225, 226, 227, 230, 231, 232, 235, 237. 
Placophyllus, Ach. (Bzeomyces), 145. 


INDEX OF SPECIES. 
Placorodia, Ach, (Parmelia), 226. 
Plicata, Fr. (Usnea), 123. 
Plicatile, Ach. (Collema) , 271, 274, 275. 
Plumbea, Lightf. (Coccocarpia), 256, 257, 258. 
Plumbea, Lightf. (Parmelia), 258. 
Polydactyla, Hoffm. (Peltigera), 173, 174. 
Polydactyla, F\k. (Cladonia), 164. 
Polymorpha, Ach. (Ramalina), 122, 126, 130. 
Polymorpha, Schrad. (Umbilicaria), 190. 
Polyphylla, Hoffm. (Umbilicaria), 182, 184, 185, 187. 
Polyrrhiza, L. (Umbilicaria), 184, 186, 188. 
Proboscidea, DC. (Umbilicaria), 182, 187, 188, 189, 
190. 
Proboscidea, Tayl. (Parmelia), 210. 
Pruinosa, Nees (Dufourea), 141. 
Prunastri, Ach. (Evernia), 137. 
Psoromia, Nyl. (Verrucaria), 175. 
Psoromoides, Borr. (Phacopsis), 175. 
Psoromoides, Borr. (Verrucaria), 175. 
Pubescens, Fr. (Ephebe), 267, 268. 
Pubescens, Fr. (Cornicularia), 267. 
Pulchella, Scheer. (Parmelia), 245, 246. 
Pulmonacea, Ach. (Sticta), 191, 192, 194, 195, 197, 
198, 199, 200, 201. 
Pulposum, Ach. (Collema), 274, 275. 
Pulverulenta, Fr. (Physcia), 119, 229, 239, 243, 247, 
248, 249. 
Pulvinata, Scher. (Omphalaria), 270. 
Pungens, Ach. (Cladonia), 166, 168. 
Pungens, Del. (Baomyces), 168. 
Pustulata, Hoffm. (Umbilicaria), 183, 184, 186. 
Pygmea, Ag. (Lichina), 113, 268, 269, 270. 
Pyxidata, Fr. (Cladonia), 112, 154, 155, 156, 157, 158, 
161, 162, 163, 164. 
Quercifolia, Sch. (Parmelia), 214. 
Quercizans, Ach. (Sticta), 194, 196, 203. 
Racemosa, Scheer. (Cladonia), 166, 167, 168. 
Radiosa, Scher. (Parmelia), 265. 
Ramulosum, Sw. (Stereocaulon), 153. 
Rangiferina, Hoffm. (Cladonia), 112, 113, 114, 154, 
155, 158, 165, 166, 168, 171, 177, 268. 
Recurva, Ach. (Parmelia), 234. 
Relicina, Fr. (Parmelia), 215, 216. 
Resupinata, DC. (Peltigera or Nephroma), 172. 
Reticulata, Tayl. (Parmelia), 210, 216, 217, 235. 
Retipora, Ach. (Cladonia), 170, 171. 
Richardi, Mont. (Sticta), 197. 
Richardsoni, Hook. (Evernia), 112, 136, 137. 
Richardsoni, Hook. (Cetraria), 137. 
Rimosa, Scheer. (Lecidea), 263. 
Roseus, Pers. (Beeomyces), 144, 145. 
Rubiginosa, Del. (Pannaria), 256. 
Rubiginosa, Ach. (Parmelia), 256. 
Rubina, Scheer. (Parmelia), 260. 
Rujfa, Ach. (Sticta), 194, 196. 
Rufescens, Hoftm. (Peltigera), 174. 
Rufus, Ach. (Beeomyces), 146. 
Rugosa, Tayl. (Parmelia), 216, 217. 

