68 



THE AMERICAN MONTHLY 



[Mar., 



Th. 

 1 

 1 

 1 



Th. 

 1 



Th. 

 1 



1 

 1 

 1 



Th. 

 1 

 1 

 1 

 1 

 1 



Th. 

 1 



Th. 

 1 

 1 



b Th. 

 1 

 1 



1 



1 



1 

 1 

 1 



1 

 Th. 



1 

 Th. 



1 



1 



1 

 1 



Omphalodium 

 13 Umbilicaria 

 63 Endocarpon 



22 Panuaria 



57 Mycoporum 



Agyrium 



61 Calicium 



62 Coniocybe 



Trypethelium 



68 Sagedia 



Pyrenastrum 



51 Opegrapha 

 Agyrium 

 61 Calicium 

 62 Coniocybe 

 68 Sagedia 



10 Parmelia 



5 Usnea 



67 



71 



uionophyllous 1 

 Apo. scutelht'form 



Apo. subcutella?form, blackened gyrose plicate 

 Apo. immersed in the thallus 



multifid 1 

 Apo. scutelliijform 



obscure 1 



Apo. rounded or oblong a 

 a black 



a softish, reddish, immarginate 

 a crateriform, exciple black 

 a globose colored, exciple obscure 



Apo. immersed in a stroma 



Apo. innate-superficial 



Apo. turbinate 



obsolete 1 



Apo. lirellneform, rather prominent 



Apo. rounded, or oblong softish, reddish, emarginate 



Apo. crateriform stipitate 



Apo. globose stipitate 



Apo. innate, superficial 

 filiform 1 



Apo. scutellaeform, disk thin 

 pendulous 1 



Disk and thallus pale 



Disk colored differently from the thallus a 

 a Disk concave, apothecia, cyathiform 4 Evernia 



a Th. mostly rounded alike on all sides 6 Alectoria 



uniform 1 



Apothecia globular, diflform 33 Pertusaria 



Apo. patellseform or cephaloid stipitate, stipe disappearing 



43 Baeomyces 



Apo. patellasform or cephaloid sessile, exciple paler than the 

 disk 44 Biatora 



Apo. same as the last but exciple often thickened and lecan- 

 oroid 45 Heterothecium 



Apo. sessile, horny exciple coal black 46 Lecidea 



Apo. same as last but not horny 47 Buellia 



Apo. solitary immersed in thalline warts, perithecium colored 



65 Segestria 



Apo. innate, perithecium black 69 Verrucaria 



stellate 1 



Apo. scutellaeform Omphalodium 



tartareous 1 



Apo. patellaefbrm, or cephaloid 44 Biatora 



Apo. patellaeform, the exciple often thickened and lecan- 

 oroid 45 Heterothecium 



Apo. patellaeform, or cephaloid, thallus lobulate, caulescent, 

 or uniform 46 Lecidea 



Apo. innate, perithecium black, ampithecium pale 69 Verrucaria 



c 



Spores simple spherical. 

 Apo. indicated only for the most part by an ostiole, but emerging 



and scutellaeform 19 Endocar]nscum 



1 Apo. globose, spores violet, black 



58 Sphaerophorus 



