1916. No. 8. MONOGRAPH OF THE NORWEGIAN PHYSCIACEAE. 49 



and from Midt-Hordland: Fusa (Lillefosse), Stat (Havaas). Trondhjem: 

 Sorgenfri (on Betula, Lynge). The r^Parmclia Iribaciai. of Sommerfelt ^ from 

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

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

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

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

 at Sjaaholmen in Varanger (Th. Fries s. n. ^PJi. stellaris (L.) Xyl. in 

 formam adsccudentem 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. ktiella and Ph. trihacia are sometimes convergent. 

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

 cendant, and more compactly imbricate laciniae. 



6. Physcia pulverulenta (Schreb.) Nyl. 

 (var. allochroa (Ehrh.) Th. Fr.) 



Lichen pidvendcntus Schreber Spicil. Fl. Lips. (177 1) p. 128. Hoff- 

 mann Enumeratio (1784) p. 76, tab. XH, fig. 2. Acharius Prodromus 

 (1798) p. 112. 



Lichen omphalodcs Wulfen apud Jacouin, Collectanea vol. II (1788I 

 p. 196, tab. X\', fig. 2 a et b. 



Pannelia pulverulenta Acharius Methodus (1803) p. 210, Lieh. Univ. 

 (1810) p. 473, Synopsis (1814) p. 214. Koerber Syst. Lieh. Germ. 

 (1855) p. 86. 



Physcia pnlvendenta Nylander Prodromus (1856) p. (308), Synopsis 

 (i860) p. 419. Th. Fries Lieh. Arct. (i860) p. 62. Nylander Lieh. 

 Scand. (1861I p. 109. Deichmann Branth og Rostrup: Eichenes Daniae 

 (1869) p. 64. Th. Frieô Eich. Scand. I (1871) p. 136. Wainio Adju- 

 menta I (1881) p. 131. Hue Addenda Nova (1886) p. 51, Eich. Exot. 

 (1892) p. 112. Crombie Brit. Eich. (1894) p. 305. Hue Eich. Extra-Eur. 

 (1900) p. 65. Dalla Torre et Sarntheim Flechten v. Tirol (1902) p. 

 155. Elenkin Eich. Ross. Med. (1907) tab. V fig. 7. Olivier Eich. 

 d'Eur. I (1907) p. 235. Harmand Eich. France (1909I p. 632. Lynge 

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

 deutschen Tieflandes (1912) p. 236. 



^ Sommerfelt Supplementum p. log. 



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



