i6 Opegrapha. 



GENUS V. 



OPEGRAPHA. pers. 



Character Naturalis. 



APOTH. Lirella sessilis, thallo subimmersa, ad- 

 pressa vel supra eum elevata, subrotun- 

 da 1. oblonga, elliptica, linearis, diffor- 

 mis, simplex, confiuens & ramosa, re- 

 cla vel flexnosa, atra. 



Discus planus 1. concaviusculus , nudus 

 1. pulveruletitus , angustus, linearis, raro 

 latiuscuius. 



Margo (proprius) tenuissimus &, saepe vix 

 perceptibilis, vei etiam tumidulus, ele- 

 vatus &, subinflexus; Accessorius (spuri- 

 us) rarius occurrit (vcrus nullus). 



(THALLUS crustaceus uniformis tenuis effusus, ra- 

 rius determinatus & leprosus). 



Spe- 



OpiGRAPHiE Genus Tlysteriis propinquum ob simi- 

 litudinem Lirellarum cum horum Perithecio. Differunt 

 vero Opegraphag ab his praesentia Thalli, disco Lirella- 

 lum spongioso proligero aperto 8C substantia eorum 

 interna vix gelatinosa. 



Obs. Lichen alneus (Hysterium pulicare? Pers.) 8c 

 Lich. congestus Lich. Prodr. (forte mera varietas prio- 

 ris) nec non Lich. elatinus ibid. (Hysterium elatinum 

 Pers. Synops. Fung.) Hysterii Genus re&ius foite in- 

 trabunt. 



