June, 1912.] 
Lichens of Northern Ohio. 
543 
ALPHABETICAL LIST OF LICHENS COLLECTED IN 
SEVERAL COUNTIES OF NORTHERN OHIO. 
Edo Claassex. 
Very little attention appears to have been given to the collec- 
tion of Lichens in Ohio since E. E. Bogue published his list of 
Ohio Lichens. The cause of this may be to some extent in a lack 
of the necessary assistance in their determination. Since the 
appearance of Tuckerman’s work, the most important is, no doubt, 
Fink’s "The Lichens of Minnesota.” As nearly all Lichens of 
Northern Ohio are apparently treated in this work it is of great 
value to all students desiring to determine the Lichens of the 
northern counties. Together with Tuckerman’s “Synopsis,” 
Sydow’s “Die Flechten Deutschlands, ” Boistel’s “Les Lichens de 
la France,” Hepp’s “Abbildungen der Flechtensporen, ” and 
several other works, it was of great use to the writer in his deter- 
minations. 
The names of the counties, where each lichen was collected, 
are abbreviated in the list: C stands for Cuyahoga, E for Erie, 
G for Geauga, L for Lake, M for Medina, O for Ottawa, P for 
Portage, S for Summit, and St for Stark. The numbers following 
the abbreviations indicate the number of places where each 
species was found. Most of the Lichens were noted to occur in 
Cuyahoga county, where the writer’s residence is located. As 
much as possible of the mode of occurrence was noted, namely, 
on bark, on rock, etc. Notwithstanding careful investigation in 
the course of about 10 years, several Lichens were found in but 
one or two localities; they are considered to be rare or hard to 
detect on account of their small size. The following ones may 
be named here : 
Acarospora fuscata (Schrad.) Th.Fr. 
Arthopyrenia conoidea (Fr.) Fink. 
Bacidia umbrina (Ach.) Branth. 
& Rostk. 
Bilimbia naegelii (Hepp) Zwackh. 
Bilimbia sphaeroides (Dicks. )Koerb 
Cetraria islandica (L.) Ach. 
(This lichen has disappeared from 
its locality, without having 
been found somewhere else.) 
Cladonia coccifera (L.) Willd. 
More species undoubtedly occur in these counties and by dili- 
gent work all may be found sooner or later. Specimens of those 
listed above and from all the localities are deposited in the writer’s 
Conotrema urceolatum (Ach.) Tuck. 
Lecanora muralis (Schreb.) Tuck. 
Lecidea uliginosa (Schrad.) Ach. 
Parmelia conspersa (Ehrh.) Ach. 
Rhizocarpon alboatrum saxicolum 
(Fr.) Fink. 
Sphinctrina tubaeformis Mass. 
Stereocaulon coralloides Fr. 
Teloschistes chrysophthalmus (L.) 
Fr. 
