Statio: ad corticem Populi: 



a) in viciniis opp. Luga distr. Petropolitani (t'requentissima) 

 leg. El en kin (1900). 



b) prope pagum Ossinovaja in gub. et distr. Kasanensi 

 leg. Krylov (1883). 



c) prope opp. Kostroma leg. Elenkin (1903). 



Obs.: Vulgatissima species thallo vulgo indinstincto (te- 



vel obsoleto), hypothallo semper albido. 



Inter specim. typica nonnulla ad formam holocarpam 



(Ehrh.) Ach. (Metb. pag. 177; Lich. Univ. pag. 207); Floerk., Lich. 



Deutsch. exs. n° 186 accedunt: „f. fere ecrustacea, apotheciis 



coacervatis ideoque varie angulosis", Th. Fries, Lich. Scand. 



82. Placodium gilvum (Hoffm.) Wain. 



erb. Arh.. t Wamioy, Nyl, Lich. Scand. pay. 144: Wain., 

 liHi. Lapp. I pay. 145 (hau.l Lichen rrrinus Ehrh.. Plant. Crypt. 



Th. F>- Lich. 



