oj some Lichens. 281 



margine integro. Ad corticem laevigatam prsecipue tiliee (eliam 

 populi j liven.). 



Spec. orig. (mimerosissim.) in herb, meo Kazani. 

 Rossia Media (Kazan). 



Physeia pidvp.rulenta, loima. granulosa, Mer. 

 Mereschkovsky, /. c. p. 227. 



Thallus epruinosus, griseus vel subglaucescente- vel olivascente- 

 griseus, lobis latis concretisque ut in typo, superne granulis 

 elevatis nudis plus minusve numerosis obtectus ; apotheoia vulgo 

 passim parce foliolis thallinis munito. 



Spec. orig. (numerosissim.) in Iieib. meo Kazani. 

 Rossi a Media (Kazan). Esthlandia. 



Suhhr ma fndiculosa, Mer. 



Mereschkovsky, I. c. p. 228. 



Thallus erectus vel subdecumbens, fruticulosus, e ramulis elongatis, 

 teretiusculis, pro parte e granulis evolutis, laxe subramosis, con- 

 sisteus ; lobis adpressis quasi destitutus. In rimis corticis 

 arborum frondosanim, locis umbrosis. 



Rossia Media (Kazan). 



Forma rugosa, Mer. 



Mereschkovsky, /. c. p. 229. 



Thallus colore et forma laciniarum ut in typo vel interdum sub- 

 fuscescens vel cervino- vel cinereo-olivaceo-rufescens vel cinereo- 

 subfuscescens, leviter pruinosus vel nudus ; apotheoia margine 

 crasso, irregulariter rugose- vel grauuloso-crenulato. 



Spec. orig. (numerosissim.) (1) ibidem, (2) in herb, Con- 

 servat. botan. Genevse (specim. a me determin.). 

 Rossia Media (Kazan). Helvetia. 



Forma venustoides, Mer. 



Mereschkovsky, Nachtrag z. Flecbtenliste a. d. Umgeg. Revals, Kazan, 

 1913. 



Thallus nudus, brunneo-rufescens vel rufescens vel cinereo-brimneus, 

 laciniis latis concretisque ut in typo ; apothecia margine iutegro 

 ut in typo, sod foliolis thallinis passim parce oruato. 



Spec. orig. (numerosissim.) in herb, meo Kazaui. 

 Rossia Media (Kazan). Esthlandia. 



