68 



THE AMERICAN MONTHLY 



[Mar., 



b Th. 

 1 

 1 

 1 



b Th. 

 1 



b Th. 

 1 



b Th 



b Th 

 b Th 



b Th 



b Th 

 b Th 



monophyllous 1 



Apo. scutellpeform Omphalodiam 



Apo. subcutellseform, blackened gyrose plicate 13 Umbilicaria 

 Apo. immersed in the thallus 63 Endocarpon 



multifid 1 



Apo. scutellseform 23 Pannaria 



obscure 1 



Apo. rounded or oblong a 



a black 57 Mycoporum 



a softish, reddish, immarginate Agyrium 



a crateriform, exciple black 61 Calicium 



a globose colored, exciple obscure 62 Coniocybe 



Apo. immersed in a stroma 67 Trypethelium 



Apo. innate-superficial 68 Sagedia 



Apo. turbinate 71 Pyrenastrum 



obsolete 1 



Apo. lirelliBform, rather prominent 51 



Apo. rounded, or oblong softish, reddish, emarginate 



Opegrapha 

 Agyrium 

 Calicium 



Coniocybe 



68 Sagedia 



10 Parmelia 



5 Usnea 



4 Evernia 

 6 Alectoria 



33 Pertusaria 



Apo. crateriform stipitate 61 



Apo. globose stipitate 62 



Apo. innate, superficial 



filiform 1 



Apo. scutellaeform, disk thin 

 pendulous 1 



Disk and thallus pale 



Disk colored differently from the thallus 

 a Disk cx)ncave, apothecia, cyathiform 

 a Th. mostly rounded alike on all sides 

 uniform 1 



Apothecia globular, diflbrm 



Apo. patellaeform or cephaloid stipitate, stipe disappearing 



43 Baeomyces 



Apo. patellaeform or cephaloid sessile, exciple paler thau the 

 disk 44 Biatora 



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

 oroid 45 Heterotheeium 



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 Ompbalodium 



tartar eous 1 



Apo. patellaeform, or cephaloid 44 Biatora 



Apo. patellaeform, the exciple often thickened and lecau- 

 oroid 45 Heterotheeium 



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

 or uniform 46 Lecidea 



Apo. innate, perithecium black, ampithecium pale 09 Verrucaria 



c 



Spores simple spherical. 

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



and scutellaeform 19 Endocarpiscum 



1 Apo. globose, spores violet, black 58 Sphaerophorus 



