1921. No. 7- STUDIES 0\ THE LICHEN FLORA OF NORWAY. 237 



Sor/r. Kongsvoll (Moe), \'aarstifn (B. L.). Xordtr. Snaasen : Gra\- 

 brøt (Norm.), Namsos (Malmgr.). 



Xordl. Bodø (Somrft.), Skjerstad (Somrft.), Steigen: Lovoen (Norm.), 

 Melbo (Norm.). Trains. Ibbestad '(B. L.), Malangen: Nordbynesset (B. L.), 

 Bardo: Innset (B. L.), and Saarivuobme (B. L.); Rystrommen (B. L.), Troms- 

 oen (B. L.l; Thomasjordaasen (Norm.); Alikkelvik (B. L.), Skjervo: Hagsten 

 I Norm. I, Lyngseidet (B. L.l, Goalsevarre (B. L.l, Serkjosen (B. L.l. Fiiiiii. 

 Alten: Todevik (Wbg.), Lille Lærrisfjord (B. L.), Kaatjord pluribi (Norm.. 

 B. L.l, Bosekop (M. N. Bl.I, Konsamfjell (B. L.l, and Rautasvarre (B. L.l; 

 Kautokeino: Avccejok (Norm.); Porsanger: Honningsvaag (H.l, and Skogan- 

 varre (B. L.l; Karasjok: Anarjok (Norm.); Laksetjord: Lebesbv (B. L.l; Tana: 

 Mehavn (H.l, Garggogæcce (B. L.), and Lævajok (B. L.); Varanger: Nyborg 

 (Th. Fr.), Mæskelv (B. L.), and \'adso (Norm.). 



Xaiitlioria Ivcliiica is a northern, alpine and subalpine species which, 

 however, descends to the level of the sea in our whole country. In South- 

 ern Norway it ascends to 15 — 1600 m. s. m. or more. 



On palings (fences, old houses, stalls and the like), on trees (one ol 

 the few lichens which are common on the stems of Bciiila odorata), but in 

 this country its chief substratum is hard rocks. — It is an extremely nitro- 

 philous or even ornithocoprophilous species. Very abundant on the moun- 

 tains and in subalpine positions on large prominent stones where birds 

 like to rest, and there associated with Rai)ia!iiia strcpsilis, Gyrophora arc- 

 tica, Physcia frihacia, coarse Parnwlia sulcata, a. o. Nowhere more abun- 

 dant than at our fishing ports in Northern Norwav: on maritime rocks 

 associated with Lccaiiora strainiiica, Physcia tribacia, Calnplaca clcgaiis, 

 and Rinodina cacnniimim, a. o.; and on the 'hjeller", stands of dried Picea 

 cxce/sa, where fish is dried. 



Xanthoria lychnca is by far the most frequent species of this genus 

 in our country. — Apothecia are common. 



It varies: Small pulvinate formae have been named f. pygmaca or f. 

 fminarkica. 



