INDEX OF SPECIES. 
Erythrophthalma, Tayl. (Collema), 278. 
Fahlunensis, Ach. (Parmelia), 112, 207, 234, 237. 
Fallax, Ach. (Cetraria), 180, 210. 
Fastigiata, Fr. (Ramalina), 129, 130, 131. 
Faveolata, Del. (Sticta), 191, 197. 
Ferruginea, Huds. (Lecidea), 265. 
Filicina, Ach. (Sticta), 191, 194, 198. . 
Filiformis, Hook. (Cladonia, Scyphophorus, or Ceno- 
myce), 163, 164. 
Fimbriata, Fr. (Cladonia), 156, 163, 164. 
Firmula, Ny1. (Physcia), 248. 
Flabellata, Mont. (Sticta), 191, 196. 
Flaccidum, Ach. (Collema), 271. 
Flammea, Ach. (Dufourea), 252. 
Flammea, Ach. (Physcia), 239, 250, 252. 
Flavicans, Tayl. (Sticta), 191, 199, 200. 
Flayvicans, DC. (Physcia), 239, 253. 
Florida, Fr. (Usnea), 123, 124. 
Foliacea, Scheer. (Cladonia), 161. 
Fragile, Pers. (Spheerophoron), 149. 
Fragile, Tayl. (Leptogium), 277, 278. 
Fragile, Tay). (Collema), 278. 
Frawinea, Fr. (Ramalina), 126, 127, 129. 
Freycinetii, Del. (Sticta), 191, 192, 197. 
Fruticosa, Scher. (Cladonia), 167, 168. 
Fuciformis, Ach. (Roccella), 131, 139, 140, 141, 
Fulgens, DC. (Placodium), 262, 265. 
Fuliginosa, Ach. (Sticta), 193, 205. 
Fulvo-cinerea, Mont. (Sticta), 197. 
Fungiforme, Schrad. (Sphyridium), 146. 
Fungiformis, Sch. (Cladonia), 160. 
Furcata, Scheer. (Cladonia), 112, 114, 154, 155, 157, 
158, 165, 166, 167, 168, 171. 
Furfuracea, Mann. (Evernia), 136, 137, 219, 235. 
Furfuracea, DC. (Borrera or Parmelia), 136. 
Furyum, Ach. (Collema), 272. 
Galbina, Ach. (Parmelia), 215. 
Gaudichaudii, Del. (Sticta), 197. 
Gelida, L. (Squamaria), 259, 261. 
Gilva, Ach. (Sticta), 192, 200. 
Glabra, Tayl. (Sticta), 191, 192, 201. 
Glauca, Ach. (Cetraria), 180, 210. 
Glaucum, Hoffm. (Platysma), 163, 178, 180, 208, 209, 
210, 233. 
Glomulifera, DN. (Ricasolia), 105, 195, 202, 203, 205, 
258. 
Glomulifera, Del. (Sticta or Parmelia), 203. 
Gracilis, Fr. (Cladonia), 154, 156, 157, 158, 160, 166. 
Granosa, Scheer. (Parmelia), 271. 
Herbacea, DN. (Ricasolia), 105, 111, 112, 195, 196, 
-199, 201, 202, 204, 205, 258. 
Herbacea, Hoftm. (Sticta), 203. 
Hildenbrandii, Garov. (Leptogium), 279. 
Hirsuta, DC. (Umbilicaria), 182, 190. 
Hirsuta, Ach. (Gyrophora), 182, 190. 
Hirta, Fr. (Usnea), 121, 122, 123, 124. 
Homalea, Ach. (Ramalina), 131. 
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Horizontalis, Hoftm. (Peltigera), 174. 
Hottentotta, Ach. (Parmelia), 235. 
Hottentotta, Ach. (Sticta or Omphalodes), 235. 
Hyperborea, Hoffm. (Umbilicaria), 185, 186, 187, 188, 
230. 
Hyperborea, Ach. (Gyrophora), 185, 186. 
Hypnorum, Fr. (Psoroma), 255. 
Hypothria, Nyl. (Parmelia), 215, 217. 
Iemadophila, Ach. (Lecidea or Biatora), 146. 
Icmadophilus, Ach. (Beeomyces), 146. 
Impressa, Tayl. (Sticta), 198, 199. 
Incana, Scheer. (Cladonia), 164. 
Incurva, Fr. (Parmelia), 234. 
Incurvus, Ach. (Lichen), 234. 
Intricata, Scheer. (Physcia), 254. 
Intricata, Mont. (Roccella), 141. 
Intricata, Fr. (Evernia), 254. 
Islandica, Ach. (Cetraria), 112, 136, 137, 148, 172, 
175, 176, 181. 
Jacobeefolius, Bernh. (Lichen), 272, 273. 
Jubata, Ach. (Alectoria), 133, 134. 
Jubata, Scheer. (Parmelia), 134. 
Juniperinum, L. (Platysma), 177, 178, 179. 
Kamtschadalis, Ach. (Parmelia), 116, 219. 
Kunthii, Del. (Ricasolia), 201, 202, 205. 
Laciniata, Ach. (Sticta), 191, 197. 
Laciniatum, Nyl. (Collema), 276. 
Lacunosum, Ach. (Platysma), 180. 
Lacunosa, Ach. (Cetraria), 181. 
Leeteforniis, Fée. (Parmelia), 210, 211. 
Leetevirens, Scheer. (Parmelia), 203. 
Leevigata, Tayl. (Parmelia), 210, 216, 217. 
Lanata, L. (Parmelia), 268. 
Lata, Tayl. (Alectoria), 134, 135. 
Lata, Tay). (Cornicularia), 135. 
Leonora, Spr. (Parmelia), 233. 
Leucomela, Mich. (Physeia), 241, 242, 248. 
Lichenophila, DR. (Synalissa), 269. 
Limosum, Ach. (Collema), 274. 
Linearis, Nyl. (Sticta), 191, 192, 194, 195. 
Linita, Ach. (Sticta), 192, 193, 194. 
Lutescens, Tayl. (Sticta), 198. 
Macilenta, Hoftm. (Cladonia), 155, 156, 163. 
Macrocarpa, Wilson (Sticta), 195. 
Macrophylla, Fée (Sticta), 194, 195. 
Maculata, Tayl. (Solorina), 258. 
Madreporiformis, Ach. (Dufourea), 112, 132. 
Madreporiformis, Wulff. (Lichen), 132. 
Madreporiformis, Sch. (Cladonia), 133. 
Marginale, Hook. (Collema), 272, 273. 
Marginalis, Huds. (Lichen), 272. 
Marginellum, Mont. (Leptogium), 278, 279. 
Marianum, (Leptogium), 278. 
Melaxanthus, Ach. (Neuropogon), 113, 118, 124, 129, 
132, 135, 238. 
Melznum, Ach. (Collema), 271, 272, Ae 
H 
