4 THE LICHEN-FLORA 



Thallus fruticulose, granula gonima connate in transverse strata ; 

 apothecia endocarpoid in swellings of the thallus. = Ephbbe. 



Thallus fruticulose, fucoid, granula gonima cserulescent ; apo- 

 thecia in terminal globose receptacles. = Lichina. 



Thallus appressed ; granula gonima moniliformi-con6rete ; apo- 

 thecia lecideine. = Pterygium. 



Thallus fruticulose ; granula gonima moniliformi-concatenate ; 

 apothecia lecideine. =Leptogidium. 



Tribe 2. Collemei. 



Thallus granulato-areolate, internally rabricose, granula gonima 

 in globular cells ; apothecia urceolato-innate ; spores simple. = 

 Pyrenopsis. 



Thallus granulose or fruticulose, granula gonima in globular 

 cells ; apothecia innate, lecanorine or endocarpoid ; spores simple. 

 =Stnalissa. 



Thallus without cortical layer, granula gonima moniliform ; 

 apothecia lecanorine; spores multilocular, rarely simple. = Col- 

 lema. 



Thallus with distinct cortical layer, granula gonima moniliform ; 

 apothecia lecanorine; spores multilocular, rarely simple. = Lep- 

 togium. 



Thallus internally green ; granula gonima submoniliform; 

 apothecia subgyalectoid. =Collemopsis. 



Thallus minute, stellate-divided, or csespitellose, or confluento- 

 efiuse ; apothecia pyrenocarpous, verrucarioid. =Ptrenidium. 



Fam. III. MYRIANGIACEI. 



Tribe I. Mtriangiei. 



Thalamium cellulose, with superimposed theciferous cavities. 

 = Mtriangium. 



Fam. III. LICHENACEI. 

 Series I. EPICONIODEI. 



Tribe I. Caliciei. 



Thallus none ; apothecia parasitic on Pertusarice globoso-turbi- 

 nate, subsessile, black; spores nigrescent, simple. = Sphinptrina. 



Thallus granuloso-pulverulent ; apothecia glpboso-turbinate, 

 stipitate, black; spores nigro-fuspous, simple or 1 -septate. = 

 Calicium. 



Thallus pulverulent; apothecia globoso-pulverulent, stipitate, 

 yellow ; spores colourless. = Conioctbe. 



Thallus granulose ; apothecia cupuliform, sessile, black ; spores 

 nigricant, 1 -septate. = Trachylia. 



