INDEX 
The genera of lichens have undergone so many changes at the 
hands of systematists of divergent views, that the specific name 
has come to be recognized as the best clue to the plants. In 
preparing the Index, the aim has been to facilitate the tracing of 
any name that has been used; specific names, along with those 
of orders and genera, &c., are listed ; varietal and well-established 
form-names are also included unless specific synonyms are recorded 
by which they can easily be identified : redundant entries are thus 
avoided as far as possible. Synonyms are indicated by italics. 
ACAROSPORA Massal. 259, 333 eruginosa A. L. Sm. (Chenotheca) 8 
accessitams Nyl. (Lecanora) 349 @ruginosa Mudd (Iemadophila) 352 
acetabulum Neck. (Lichen) 142 @ruginosum Sm. (Caliciwm) 8 
acetabulum Dub. (Parmelia) 142 @ruginosum 8. F. Gray (Phacotrum) 8 
Acharii Westr. (Lichen) 328 eruginosus DC. (Baomyces) 352 
Acharwi Ach. (Urceolaria) 328 @ruginosus Scop. (Lichen) 352 
aciculare Fr. (Calicium) 7 affims Hook. (Squamaria) 85 
acicularis Zwackh (Chenotheca) 6 affinis Dicks. (Lichen) 85 
acicularis Sm. (Lichen) 6 afinis Massal. (Hymenelia) 332 
ACOLIUM S.F.Gray 20 Agardhiana Ach. (Lecanora) 280 
ACROCORDIA Massal. 484 | Agardhianwm Hepp (Placodiwm) 215 
acteea B. de Lesd. (Lecania) 342 | ageleea Koerb. (Phlyctis) 380 
acteaa Nyl. (Lecanora) 3438 agelea S. F. Gray (Thelotrema) 381 
actinellum Nyl. (Pyrenidium) 481 agelea Turn. & Borr. (Variolar.) 381 
actinostoma Pers. (Urceolaria) 384 ageleus Ach. (Lichen) 381 
actinostomus Zahlbr. (Diploschistes) | aggregatuwm Nyl. (Collema) 63 
384 _ aggregatus Th. Fr. (Synechobl.) 63 
aculeata Fr. (Cetraria) 158, 186 | AGYROPHORA A. Zahlbr. 389 
aculeata Ach. (Cornicularia) 159 _ aipolia Nyl. (Physica) 239 
aculeatus Schreb. (Lichen) 159 | aipolius Ach. (Lichen) 239 
acuminata Norrl. (Cladonia) 435 aipospila Ach. (Lecanora) 343 
addubitans Wheld. & Wils. (Poly- | aipospila Th. Fr. (Lecania) 343 
blastia) 483 aipospila Wahlenb. (Parmelia) 343 
addubitans Stirt. (Verrucaria) 484 aitema Ach. (Lecidea) 294 
adglutinata Floerk. (Lecanora) 244 | albariella A. L. Sm. (Lecania) 344 
adgiutinata Nyl. (Physcia) 244 albariella Nyl. (Lecanora) 344, 347 
admissa Nyl, (Lecanora) 339 albella Ach. (Lecanora) 281 
adspersa Cromb. (Cladonia) 448 albella S. F. Gray (Rinodina) 282 
@quata Nyl. (Lecanora) 254  albellus Pers. (Lichen) 282 
@quata Nyl. (Lecidea) 254 albocarnea Nyl. (Lecidea) 349 
equata Oliv. (Rinodina) 254 | albocincta A. L. Sm. (Biatorella var.) 
eeruginascens Oliv. (Lecaniavar.) 345 | 472 
