I92I. No. 7. STLÜIES OX THE LICHEX FLORA OF XORWAY. 235 



Tclcm. Langesund (B. L.). Austagd. Lyngor very frequent (B. L.), 

 Arendal: Tromoen (B. L.), Eyje: Landsyerk (Sor.). J'cs^agc/. Kristianssand 

 (B. L.), Flekkerø (Hoch), Mandal (B. L.), Farsund (Anderss.). 



Hon/. Moster (H.), Anuglen (Du Rietz), Megster (Du Rietz), Store 

 Kalsø (B. L.), Fiile Thuro (Du Rietz), Ask (Norm.), Bergen (Friele), Stran- 

 debarm: Skogesal (Lillef.), and Ljones (Lili.ff.), Granxin (IL), X'osseyan- 

 gen (B. L.). Soi^-i/. Loen (Jehe), Olden (Jebe). Aloir. Ronisdalen (Lixds.). 



H(Yf. S. Odalen: Sander (B. L.), Solor: Jesaasyand (B. L.), and Hasle- 

 mo (B. L.), X'eldre (Nordh.). Op/. LilKhanimer (Jebe), Kringen (Th. ¥r.), 

 Toten (SoMRFT.), Gran (Jebe), Brandbu (}]. L.), Huberg: Lia (B. L.), Tor- 

 pen: Reste (B. L.). 



Sarfr. Ti-ondhjem (Kixdt). Xonifr. Stjordalen (Somrft.), Frosta (Jørst.). 



Non//. Rødø (Guxx.), Gildeskaal: Indyr (Norm.), Bodo (Somrft.), Salt- 

 dalen (Somrft.), Steigen: Laskestad (Norm.), Ofoten: Fagernes (Norm.), 

 Kirkeyaag (Norm.), Melbo (Norm.). Tro/iis. Harstad (Norm.), Finsnes (B. L.), 

 Gibostad (B. L.), Mesteryik (B. L.), Tromsoen (Norm.), Kyaloen (Wbg.). 

 Fin/Il. Alten: Oskarnes (B. L.); Maaso (Whg.), Honningsyaag (Hoch); Pors- 

 anger: Borsely (Norm.), and Skoganvarre (B. L.); Laksetjord: Sjaaholmen 

 (Th. Fr.); Tana: Gullholmen (Th. Fr.); Waranger: Syltet'jord (Norm.). 



On yery difterent substi-atuni: The stems of deciduous trees, wood, 

 rocks, occasionally also on moss. 



A faithful attendant of Popii/iis tiriitu/a in the southern lowlands, but 

 it does not ascend so high as this tree, it rarely surpasses 300 — 35om.s.m. 

 A yery characteristic and conspicuous plant on maritime rocks in S. and 

 W. Norway, but less common at the western fjords. In N. Norway it is 

 yery rare in the inlands, but not rare on maritime rocks, associated with 

 XaiitJtoria /yc/iiica, P/ivscia tn'/xjcia and other nitrophilous lichens. 



This frequent lichen is \-ery yariable. A pale form which has been 

 named f. c/i/orina or f. g/aiiccscciis, is not rare. I haye especially seen it 

 on Saiii/ntciis, it is not restricted to shady stations alone. Otherwise X. 

 parictiiia may be more or less intensely coloured, the laciniae more or less 

 incise, broad or narrow, imbricate or not, all of which modifications ha\e 

 been named. — Isidiate plants haye not been obseryed from Norway. 



One of our quickest growers. I haye seen well de\'eloped thalli on 

 Hying twigs of Picea c.xcc/sa, only 2 -3 years old, and ripe apothecia on 

 twigs 5 years old. 



2. Xanthoria fallax (Hepp) Du Rietz. 

 .Syn. Xaiitlioiia sii/)str//aris (Ach.) Wain. 

 Akrrs/i. Kristiania: Ullern (M. N. Bi..). Bus/e. Modum (Moe). 

 Op/. 'Toten in cortice L'/iiii, Accris etc., Lixaiioni caudc/aria y s/i/>- 

 stiP/afa AcH. syn. Subtus alba librilloso, omnino l\xnuciiac species'. 

 (Somrft. hb.note.). 



Sortr. Trondhjem (Serxaxder). 



