Verrtjcaria. 



tillo majora. Cmsta omnino pulveracea a conge- 

 neiibus distincta. 



5< Verrucaria byssacea: crusta tenui alba sub- 

 pulverulenta; tubercuiis minutis subimmersis 

 umbilicatis nigris. 



Sphceria hyssacea Weig. Obs. Bot. p. 42. PERS. 



Synops. Meth. Fung. App. p. xxvil. 

 Icon. Weig. 1. c. T. 2. f. 9. 



Habitat acl caudices Quercus annocas. 

 Obs* Qua crustam 8C Apothecia maximam prodit 

 curn Verrutaria sticlica affinitatem, sed tubercula 

 in V. kyssacea vix umquam supra crustam elevata 

 nec globosa. Simihs Lecidecz dryintz. 



t>. Verrttcaria leucocephala,: crusta tenui cinereo- 

 virescente; tuberculis confertis prominentibus 

 subglobosis umbilicatis nigris albo-pruinosis. 



Lichen colliculosus Hoffm. Enum. Lich. p. 17. 



Spheria leucocephala EHRH. Pl. Cr. exs. 



290. PfiRS, Synops. Meth. Fung. App. p. 



XXVII. 



Xcon. Hoffm. 1. c. T. 2. f. 2. 

 Habitat ad saepes & corticem arborum ex- 

 siccatarum. 



Obs. Potius Verrucariis adnurneranda quam S})h<z- 

 riis. Tuhercula hemisphserica. 



/3. V. amphibola: crusta pulverulenta albo-cas- 



sia; tuberculis pruina concolori tedtis. 

 Lichen amphibolus Lich. Pr. p. 29. 

 Habitat in truncis vetustis quercinis. 



Obs. Detersa farina Apotheciorurn atra sunt 8£ 

 uinbilicata. Tubercula magis exacte globosa in hac 

 quam in Verr. leucocephala. DifFert etiam ab hac 

 colore pulveris crustae 8C tuberculorum , sed vix 

 specie. 



7. Ver- 



