igi6. No. 8. MONOGRAPH OF THE NORWEGIAN PHYSCIACEAE. 49 



and from Midt-Hordland: Fusa (LILLEFOSSE), Stat (HAVAAS). Trondhjem: 

 Sorgenfri (on Betula, LYNGE). The xParmelia lribacia. of SOMMERFELT * from 

 Saltdalen is absent in his herb., but the description agrees with this spe- 

 cies. In the Tromse and Finmarken districts in Northern Norway it is 

 evidently frequent everywhere: along the coast at Ibbestad, Malangen, 

 Troms0, Serkjosen, and Honningsvaag at places where fish is dried, also 

 at Sjaaholmen in Varanger (TH. FRIES s. n. Ph. stellaris (L.) NYL. in 

 formam adsccndentem transiens, Herb. Upsala); in the interior abundant on 

 the mountains of Maalselven, Bardo, Dividalen, Lyngen, and Nordreisen, 

 abundant along the road from Lakselv over Skoganvarre and Natvand to 

 Karasjok, and at Assebakte in the Karasjok valley (LYNGE). 



Old plants of Ph. tcnella and Ph. tribacia are sometimes convergent. 

 Ph. tribacia has broader and shorter, more crenate and lacerate, less as- 

 cendant, and more compactly imbricate laciniae. 



6. Physcia, pulverulent a (SCHREB.) NYL. 

 (var. allochroa (HRH.) TH. FR.) 



Lichen pulverulentus SCHREBER Spicil. Fl. Lips. (1771) p. 128. HOFF- 

 MANN Enumeratio (1784) p. 76, tab. XII, fig. 2. ACHARIUS Prodromus 

 (1798) p. 112. 



Lichen omphalodes WULFEN apud JACQUIN, Collectanea vol. II (1788) 

 p. 196, tab. XV, fig. 2 a et b. 



Parmelia pulverulenta ACHARIUS Methodus (1803) p. 210, Lich. Univ. 

 (1810) p. 473, Synopsis (1814) p. 214. KOERBER Syst. Lich. Germ. 

 (1855) p. 86. 



Physcia pulverulenta NYLANDER Prodromus (1856) p. (308), Synopsis 

 (1860) p. 419. TH. FRIES Lich. Arct. (1860) p. 62. NYLANDER Lich. 

 Scand. (1861) p. 109. DEICHMANN BRANTH og ROSTRUP: Lichenes Daniae 

 (1869) p. 64. TH. FRIEI, Lich. Scand. I (1871) p. 136. WAINIO Adju- 

 menta I (1881) p. 131. HUE Addenda Nova (1886) p. 51, Lich. Exot. 

 (1892) p. 112. CROMBIE Brit. Lich. (1894) p. 305. HUE Lich. Extra-Eur. 

 (1900) p. 65. DALLA TORRE et SARNTHEIM Flechten v. Tirol (1902) p. 

 155. ELENKIN Lich. Ross. Med. (1907) tab. V fig. 7. OLIVIER Lich. 

 d'Eur. I (1907) p. 235. HARMAND Lich. France (1909) p. 632. LYNGE 

 Busk- og bladlaver (1910) p. 103. SANDSTEDE Flechten des n. w. 

 deutschen Tieflandes (1912) p. 236. 



1 SOMMERFELT Supplementum p. 109. 



Vid.-Selsk. Skrifter. I. M.-N. Kl. 1916. No. 8. 



