78 



THE AMERICAN MONTHLY 



[Mar., 



Sp. elipsoid, not simple, multiform, etc., — Continued. 



1 Th. uniform 36 Urceolaria 



1 Th. folliaceous n 



n Apothecia blackened, gyroseplicate 13 Umbilicaria 



n Thallus dark green 27 CoUema 



n Thallus lead colored 28 Leptogium 



2 Apothecia sessile, exciple paler than the disk 45 Heterothecium 



2 Apo. sessile, exciple coal black 



2 Apo. angulate, exciple softish 



3 Exciple with black disk and white margin 

 3 Ex. with a torn margin 



3 Ex. with an entire margin 



4 Thallus innate in the matrix 



4 Th. uniform or obselete 



5 Immersed in the thallus 

 5 Im. in a stroma 

 5 Innate 

 5 Immersed in thalline warts p 



p Paraphyses distinct 

 p Paraphyses obsolete 

 5 Apothecia prominent q 

 q Turbinate 

 q Not turbinate 

 c Brown a 

 c Colorless b 



a Apothecia scutellaeform 1 



1 Thallus crustaceous or evernaeform 



1 Th. crustaceous foliaceous 

 a Apothecia zeorine or biatorine 

 a Apo. in a stroma 2 



2 Concave in a white stroma 

 2 In a verruaceform stroma . 



b Apothecia lirelelaeform 

 b Apo. crateriform 1 

 1 Urn shaped 



1 Stipitate 

 b Apothecia in a stroma 2 



2 In a white stroma rounded or oblong concave 

 2 Immersed, paraphyses distinct 

 2 Innate, paraphyses slender, indistinct, or obsolete 69 Verrucaria 



d Brown 1 

 d Colorless 2 



47 Buellia 



52 Xylographa 



36 Urceolaria 



37 Thelotrema 



38 Gyrostomum 



52 Xylographa 



53 Graphis 



63 Endocarpon 



67 Trypethelium 



69 Verrucaria 



65 Segestria 

 66 Staurothele 



71 Pyrenastrum 

 70 Pyrenula 



11 Physcia 



12 Pyxine 



32 Einodina 



55 Glyphis 



67 Trypethelium 



53 Graphis 



60 Acolium 



61 Calicium 



55 Glyphis 

 67 Trypethelium 



1 Apothecia patellaeform 



1 Apo. immersed 



2 Apo. zeorine 



2 Apo. biatorine 



2 Apo. patellaeform m 



m Stipitate 



m Sessile, spores colorless 



m Sessile, spores decolorate 

 2 Apothecia cephaloid n 



n Stipitate 



n Sessile 

 2 Apothecia immersed o 



o In the thallus 



o In thalline warts 

 6 Apothecia urceolate 

 e Apo. globular, prominent 



47 Buellia 



63 Endocarpon 



31 Lecanora 



35 Gyalecta 



43 Baeomyces 



46 Lecidea 



47 Buellia 



43 Baeomyces 

 46 Lecidea 



63 Endocarpon 

 65 Segestria 



37 Thelotrema 

 70 Pyrenula 



