LTCHENES. 131 



Synopsis of the Genera. 



I. Thallus adherent, crustaeeous, amorphous. 



A. Apothecia wore or less stipitate. 



a. Apothecia rounded, fleshy, with the stipes solid (mycince). 



PSELDO-FUNGI. 



Fam. L B.eomyce^e. 



1. B/EOMyces. Thallus crustaeeous, spreading, adnate. Apo- 

 thecia (mycince) orbicular, convex, capituliform, not bordered, 

 sessile upon a solid stipes. 



b. Apothecia hollow, goblet-shaped (pilidia). 

 Fam. II. Calicioide;e. 



2. Calicium. Thallus crustaeeous, spreading, adnate, uniform. 

 Apothecia (pilidia) goblet-shaped, more or less stipitate, filled 

 with a compact pulverulent mass which constitutes the disk and 

 is plane or subglobose. 



B. Apothecia sessile. 



a. Apothecia linear ( firellce). Pseudo-Hypoxyla. 



Fam. III. Graphide.e. 



3. Arthonia. Thallus crustaeeous, spreading, adnate, uni- 

 form, cartilagineo-mcinbranacoous. Apothecia innately sessile, 

 roundish, hut varying in form, sometimes elongated, nearly 

 plane. nol bordered, black, covered by a subcartilaginous mem- 

 brane, within subgelatmous, uniform. 



4. Oim (.i:\imia. Thallus crustaeeous, membranaceous or 

 leprose, spreading, adnate, aniform. Apothecia (Urellce) elon- 

 gated, simple or branched, sessile or immersed, the dish narrow 



with a proper bordu r and Sometimes with an additional one do- 

 rived from the thallus. 



I». . ipothecia hemispherical ( tuben via ). ■ nclosing a nucit us, 



Fam. I V. Verri i irie b. 



.). \'i;itm < \ni\. ThaUus crustaeeous or cartilagtneo-mem- 

 branaceous, spreading, adnate, unitorni. Apothecia (tubercula) 

 hemisphssrica] or subglobose, innate and immersed or sessile, 

 corneous, of a different colour and substance from the ikaUus, 

 (mostly a black erusl or shell) enclosing a wu cfct w, the apex 

 papillary, often at Length perforated, sometimes ooTered by the 

 wart-like proc esse s of the thallus* 



