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, 

 Finlc'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 Tuckennan'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 Simimit, 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 f uscata (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. 



Conotrenia urceolatum (Ach.) Tuck. 

 Lecanora muralis (Schreb.) Tuck. 

 Lecidea uliginosa (Schrad.) Acli. 

 Parmelia conspersa (Ehrh.) Ach. 

 Rhizocarpon alboatrum saxicolum 



(Fr.) Fink. 

 Sphinctrina tubaeformis Mass. 

 Stereocaulon coralloides Fr. 

 Teloscliistes chrysophthahiius (L.) 



Fr. 



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 



