54 BERNT LYNGE. M.-N. KL 



with var. angustata. Less pruinose states, intermediate between f. super- 

 fusa and var. angustata, are known from Minne near Eidsvold and Kols- 

 aas near Kristiania (LYNGE). It has a wide distribution : Crimea 

 (MERESCHKOWSKY), Steiermark (ZAHLBRUCKNER), France (HARMAND), and 

 Norway. 



var. argyphaea (Acn.) NYL. 



Parmelia pulverulenta var. argyphaea ACHARIUS. Lich. Univ. (1810). 

 p. 474, Synopsis (1814) p. 214. 



Parmelia pulverulenta var. argyphaea NYLANDER Lich. Scand. (1861) 

 p. 109. TH. FRIES Lich. Scand. I (1871) p. 137. CROMBIE Brit. Lich. 

 (1894) p. 306. DALLA TORRE et SARNTHEIM Die Flechten von Tirol (1902) 

 p. 156. OLIVIER Lich. d'Eur. I (1907) p. 236. HARMAND Lich. France 

 (1909) p. 634. 



Exsic. ANZI Lich. Ital. sup. 122 (not 123 var. argyphaea f. polita 

 FLW.). SCHAER. Lich. Helv. 356 (s. n. Parmelia pulverulenta a allochroa 

 a. corticola SCHAER.). 



Differs from var. allochroa in having firmer closely imbricate, short 

 laciniae with widened apices, and especially by the entirely albo-prui- 

 nose thallus and apothecia. 



I have seen entirely milk-white specimens from Southern Europe. No 

 such specimens have hitherto been detected in Norway, but several of the 

 fl//o/jroa-specimens approach it closely. A fertile muscicolous spe- 

 cimen from Lyngseidet in Northern Norway (LYNGE) apparently belongs to 

 f. argyphaea; its exterior approaches Ph. muscigena, but the chemical 

 reaction of the hymenium is J first blue, then immediately sordid 

 vinous red. 



f. venusta (AcH.) NYL. 



Parmelia venusta ACHARIUS Methodus (1803) p. 211, et tab. VIII, fig. 5, 

 Lich. Univ. (1810) p. 475. 



Physcia venusta (Acn.) NYL. DALLA TORRE et SARNTHEIM Die Flechten 

 von Tirol (1902) p. 157. 



Physcia pulverulenta var. venusta. NYLANDER Prodromus (1857) p. 308. 

 Synopsis (185860) p. 421. Lich. Scand. (1861) p. no. TH. FRIES Lich. 

 Scand. I (1871) p. 138. HUE Lich. Exot. (1892) p. 112 (as subspecies). 



