THE LICHEN-FLORA 



Apothecia prominent, with 2 or 4 longtitudinally parallel 

 hyrnenia in each ; spores 8, simple. = Ptychographa. 



Apothecia red, rotundate or oblong, biatorine, plane, internally 

 colourless ; spores 8, simple. = Agyeium. 



Apothecia black, tumid; hypothecium black, entire; spores 8 

 or numerous, simple or 1-septate. = Lithographa. 



Apothecia black, superficial ; perithecium black, entire ; spores 

 8, obovate or fusiform, 1-multiseptate ; paraphyses indistinct. = 

 Opegeapha. 



Apothecia black, impressed in thalline verrucse and surrounded 

 with a spurious thalline margin ; hypothecium black ; spores 

 fusiform, 3-septate = Plattgrapha. 



Apothecia brownish, punctiform or elongate, immersed ; hypo- 

 theciutn colourless. = Stigmatidium. 



Apothecia roundish, plane, or tumid, innately sessile ; asci pyri- 

 form in excavations of the subgelatinous hymenium ; paraphyses 

 none =Arthonia. 



Apothecia black, innate or immersed ; spores 8, oblong or 

 lineari-elongate or cylindrical, pluri-locular ; paraphyses distinct. 

 = Geaphis. 



Apothecia substellato-radiate, immersed in white rounded ver- 

 rucse ; spores fusiform, 3-septate. =Chiodecton. 



Apothecia intricato-fiexuose, immersed in white piano-depressed 

 verrucse. = Glyphis. 



Apothecia black, superficial, arthonoid ; spores 1-septate ; para- 

 physes distinct. =Melaspilea. 



Tribe XVII. Peridiei. 



Apothecia containing many hyrnenia conjoined as in a common 

 excipulum, but without perithecia.=MYC0P0KUM. 



Apothecia rotundate, depressed in the centre, dehiecing by a 

 subradiate fissure. =Rimularia. 



Series VI. PYEENODEI. 

 Tribe XVIII. Pyrenocarpei. 



Apothecia single in citrine sphserical thalline verrucse; spores 



numerous. = Thelocarpon. 

 Perithecia black, immersed in a squamulose thallus ; spores 8. 



septate. = Normandina. 

 Perithecia pale, immersed in a peltate or squamseform thallus ; 



spores 8, simple. =Endocarpon. 

 Perithecia black, rarely coloured, entire or dimidiate, semi- 

 immersed or sessile ; spores 8 or numerous, simple or variously 

 septate. = Verrucaria. 



Foliicolous. =Strigdla. 



Perithecia numerous, minute, black, imbedded in a round or 

 oblong blackish plane apothecium. = Melanotheoa. 



Perithecia several, stellato -congregate, their ostiola converging 

 into one common central poriform epithecium. = Astrqthelium. 



