pag. 216; Fr., Lich. Eur 



Icon.: Fl. Dan. Tab. 957; Hoffm., Enum. lich. Tab. XIII fig. 1. 2. 



Exs: Fr., Lich. Sikm>. n" mi: Schnrr . Lich. Holv. n" 35o; Moiuj. ct Xexll., 

 (>:>: Iittbmh., Lich. Eur. n" 185: L*7>prf, PI. Grypt. n" 215: Zirarhh, Lich 

 n"ll(S3: ,l,Wd, Lich. Monac n" Wl. 4<it>: Fl. «'xs. Austr.-Hung. n° 2732. 



Statio: ad corticem arborum frondosarum, praecipue Popn- 



im in sylvis a) prope pagum Duderhof distr. Petropolitani 



leg. Elenkin (1903). 



b) ad corticem Betuiae prope pagum Liubercy (gab. Mosqua) 



leg. Elenkin (1903). 



Obs. I. Subtus fibrillis rhizineis albidis a Phy sc ia 



>olia (Ach.) Nyl. bene differt. 



Obs. II. Hydrate kalico addito stratum corticale lutescit 



fulvescit, medulla autem immutata manet (KHO±). 



88. Physcia aipolia (Ach.) Nyl. 



in Flora (1870) pag. 38; Hue, Addenda n u 373; Wain., Lich. Viburg. 

 . 51; Lich. e Caucaso et e penins. Taur. pag. 300: Lich. Siliir. Mcrid. 

 . 14; -Lichenaipoliusld, Prodr. (1798) pag. 112: -Par- 

 lia aipolia Meth. pag. 209; Lich. Univ. pag. 477: Syn. pag. 215; — 

 yscia stellaris var. ai pol i a Nyl., Lich. Scand. pag. Ill; Th. 

 Lich. Scand. pag. 139 (forma). 



Icon.:. Tula*.. Mem. lich. Tab. I, fig 8 — 16; Mass., Worn. fig. 34. 



Exs: Finn*., Dt-utscli. Lich. n" 135; Dexmazieres,n'> 145; Funk, Ficlitlgl). 

 175; Lrir/ht. Lich. Brit. n« 6; Mass., Lich. Ital. n" 31 S: Hn>l>- Fl. Eur. 



Statio: ad truncos arborum irondosarum (praecipue Po- 

 pulorum) in sylvis a) prope pagum Oranienbaum 



leg. Elenkin (1903) 



b) prope pagum Voskressenskoje, distr. Rybinsk, gub. 

 Jaroslavl leg. Dmitriev (1899). 



c) prope Kriukovo (gub. Mosqua) . leg. Elenkin (1903). 

 Obs. Subsimilis Physciae steliari (L.) XyJ , sed ut, 



eel. Xylander (1. c.) primo detexit, reactions thallina ah ea 

 distinguitur, nam hydrate kalico addito Physciae aipo- 

 liae color thalli in partibus externis internisque plus minus 

 lutescit (KH04=), Physciae steliari — modo in partibus 

 externis mutatur. (KHO + ). 



Quamquam hare reaetio non semper est bene conspicua, 

 stratum corticale hydrate kalico fulveseens, raro lutescens, 



