PRODROMUS FLOR/E N0V0-GRANATENS1S. 231 



Obs. — Comparanda videtur Arthoniœ pruinosœ Ach., sedjam forma 

 et magnitudine minore apotheciorum differens; ha3C formam habeni fere ut 

 sœpe in A. rubella. — Var. denudata, apotheciis denudatis nigricantibus 

 vel nigris, datur e Villeta, altit. 1200 metr. , in coll. Lindig. sub n° 890 

 (at ssepius sub eodem numéro A. rubella). 



5. Arthonia fuscoalbella Nyl. — Thallus albus tenuissimus 

 cleterminalus ; apothecia fusconigra vel fusca aut pallescentia mi- 

 nuta oblongo-difformia vel subramosa planiuscula aut ingequalia, 

 intus albida; sporae 8 nœ oblongoe vel oblongo-ovoideae 3-septatae, 

 longit. mm ,016-20, crassit. mm ,006-7. Gelalina hymenea iodo 

 vinose lutescens. 



Ad cortices, insylva, prope Bogotam, altit. 2600 metr. (coll. Lindig. 

 2883 et 850). 



Obs. — Comparanda est Arthoniœ varice (Ach., A. Antillarum Fée) 

 minori, sed diversa videtur apotheciis minoribusminusque confertis, gela- 

 tina hymenea iodo haud cœrulescente, etc. Admixta prope Bogotam obvenit 

 cum Opegrapha varia s zv. diaphora Ach. — Comparetur Arthonia 

 perpallens Nyl., cui thallus macula albida subdeterminata indicatus ; 

 apothecia pallida (vel tlavescenti-pallida) rotundata (lat. mm ,5-0 mm ,6) 

 vel nonnihil difformia, plana innata ; sporae oblongo-ovoidese 3-septatse 

 (septis extremis ah utroque apice sequaliter distantibus), longit. mm , 012- 

 1/i, crassit. ,nm ,OOA5-O iam ,0050, gelatina hymenea iodo dilute vinose 

 rubescens. Ad corticem in insulis Bonin ad Japoniam. 



6. Arthonia pulicosa Nyl. — Thallus albidus (vel albus) sub- 

 effusus sat tenuis rugoso-insequalisvelplicato-diffractus; apothecia 

 fusca vel fusconigra (vel subnigra, et humida fusco-rufescentia) 

 oblonga (rotundata aut sublinearia vel nonnihil difformia) pla- 

 niuscula parva, sœpius sat conferta, intus pallida; sporse 8 nœ inco- 

 lores (demum fuscescentes) oblongo-ovoidese, 3-septalie, longit. 

 ram , 011-16, crassit. mu, ,00ft5, thalainium et hypothecium fere 

 incoloria. Gelatina hymenea iodo (dilute) cœrulescens. 



Ad corticem Quercus insylvis. Bogota, altit. 2600 metr. (coll. Lindig. 

 2868). 



Obs. — Species optime distincta. Variât thallus rugosus rimulosus. 



