INDEX 
hymenium Ach. (Thelotrema) 374 
hymenius Ach. (Lichen) 374 
hyperborea Ach. (Gyrophora) 392 
hyperborea Hofim. (Umbilicaria) 393 
hyperboreus Ach. (Lichen) 392 
hyperellum Ach. (Calicium) 13 
hyperellum S. F. Gray (Phacotrum) 13 
hyperellus Ach. (Lichen) 13 
hypergenum Nyl. (Collema) 55 
hyperopta Ach. (Parmelia) 136, 151 
hypneza A. L. Sm. (Bacidia var.) 476 
hypnorum Ach. (Lecanora) 90 
hypnorum Dicks. (Lichen) 90 
hypnorum Wulf. (Lichen) 272 
hypnorum Koerb. (Pannaria) 90 
hypnorum S. F. Gray (Psoroma) 89 
hypnorum Hook. (Squamaria) 90 
hypocyanea Stirt. (Lecidea) 468 
HYPOGYMNIA Nyl. 118 
hypomela Cromb. (Lobaria var.) 116 
hypophea A. L. Sm. (Biatorella) 473 
ICMADOPHILA Massal. 
489 
icmadophila Ach. (Lecidea) 352 
icmadoplila Ehrh. (Lichen) 352 
icmadophilus Nyl. (Baomy.) 352, 403 
icterica Tayl. (Lecidea) 220 
ilyophora Wheld. & Wils. (Bilimbia) 
475 
ilyophora Stirt. (Lecidea) 475 
impexa Harm. (Cladomia) 415 
implexa Nyl. (Alectoria) 185 
implexa Hofim. (Usnea) 185, 188 
imalpina Ach. (Lecanora) 210 
incarnata Leight. (Pertusaria) 312 
inclusus Sm. (Lichen) 379 
imcrassata Nyl. (Ramalina var.) 
incrustams Ach. (Lecanora) 208 
incrustansA.L.Sm.(Placodium) -208 
incurva Fr. (Parmelia) 141 
incurvus Sm. (Lichen) 128 
imcurvus Pers. (Lichen) 142 
infundibulifera Wain. (Cladonia var.) 
465 
inquinans Trey. (Cyphelium) 21 
inquinans Sm, (Lichen) 21 
inquinata Th. Fr. (Pertusaria) 375 
instratula Nyl. (Lecidea) 470 
intermedia Nyl. (Ramalina) 171 
intermutans Nyl. (Lecanora) 317 
intestiniformis Ach. (Usnea var.) 182 
259, 352, 
173 
intexta Stirt. (Usnea) 178 
intricata Mudd (Borrera) 231 
intricata Ach. (Lecanora) 303 
intricata Arn. (Omphalaria) 40 
intricata Scher. (Physcia) 230 
intricata Nyl. (Synalissa) 40 
imtricatum Nyl. (Nematonostoc) 40 
imtricatus Desf. (Lichen) 230 
intricatus Schrad. (Lichen) 303 
intumescens Koerb. (Lecanora) 272 
intumescens Rebent. (Parmelia) 273 
| inversa Nyl. (Lecanora subsp.) 299 
irrubata Nyl. (Lecanora) 224 
wrrubata Ach. (Lecidea) 224 
irrubescens A. L. Sm. (Placodium 
subsp.) 210 
Isidia xiii 
isidioides Mudd (Borrera) 249 
isidioides Nyl. (Collema) 49 
isidioides Nyl. (Lecanora) 249 
isidioides Borr. (Parmelia) 249 
isidioides Oliv. (Rinodina) 249 
isidiosa Del. (Cenomyce) 432 
Isignyt Del. (Cenomyce) 435 
islandica Ach. (Cetraria) 156, 488 
islandica Mudd (Cornicularia) 157 
islandicus L. (Lichen) 157 
jacobeifolius Schrank (Lichen) 54 
Jacquint With. (Lichen) 393 
JONASPIS 332 
jubata Ach. (Alectoria) 186 
jubatus L. (Lichen) 187 
juniperina Ach. (Cetraria) 152 
juniperinum Nyl. (Platysma) 152 
juniperinus L, (Lichen) 152 
juniperinus Huds. (Lichen) 193 
kenmorense A. L.Sm. (Pterygium) 45 
kenmorensis Nyl. (Lichiniza) 46 
kenmorensis Holl. (Synalissa) 46 
kylmoriense Larb. (Calictum) 4 
kylmoriensis Cromb. (Sphinctrina) 
4, 307 
labrosa Ach. (Parmelia var.) 119 
lacer Sm. (Lichen) 15 
lacerum Ach. (Collema) 175 
lacerum S. F. Gray (Leptogium) 75 
lacerus Liljeb. (Lichen) 75 
