156 I'.F.KNT LYNfiK. M.-N. Kl. 



Il |)r( l'( IS r>(litl(t ;in(l yl/niis, hul il is alsD ffjiind on /''/////.s, especially in 

 Norlhcrn Norway. In Xorilicrn Norway (Troms and Finmark) it is often 

 found on stone (stations with an asterisc), in Western Norway it also occa- 

 sion;ill\' occui's on rocks. 



The above stations do not give an adequate idea of its distribution 

 and frequency in Soutliern Norway, for it is so common that it was utterly 

 neglected by many botanists who were only interested in 'rare' species. 

 In Southern Norway it will surely be found almost everywhere lower than 

 the tree line. In Northern Norway it is evidently still more abundant, 

 because Bctiila and .Uinis (its best substratum) are so abundant there. 



f. caesiopriiinosa Lvxge. 



Opl. Fluberg: Lia (B. L.). 



'fro/iis. Maalselven: Church (B. L.), and Bjornstad (B. L.), Bardo: Innset 

 (B. L.); Tromso (hb. Norm.); Lyngen: Lulle (B. L.); Nordreisa: Sappen (B. L.). 

 Fiiiiii. Alten: Leirbotn (B. L.), and Sakkobani (B. L.); Porsanger: Skoganvarre 

 saxicola (B. L.); Varanger: Bergeby saxicola (Nissen). 



f. cacsiopniinosa is common in Northern Norway (Troms and Finmark), 

 It is also found — though sparingly and not very t3'pical in Southern 

 Norway. There is every transitional stage between thalli, entirely covered 

 with pruina, and thalli with traces only of pruina. I therefore consider this 

 modification, as well as corresponding foYmae in the P. sa.xatilis tribus, to 

 be an individual variation; its greater frequency in Northern Norway indi- 

 cates climatic causes. 



f. septentrionalis Lynge. 



Hed. Tonset (Østman). 



Tronis. Maalselven: Likkavarre (B. L.). 



This nitidous small forma is evidentlv rare in Norwav. 



'22. ParmeUa aspidota (Ach.) Röhl. 



05//. Fredriksstad: Græsvik (B. L.), Eloen (B. L.), Jeloen (B. L.). Akcrs/i. 

 Kristiania, Asker, and Hakedalen, ver\' common (Moe, B. L.). J'rsff. Notiere 

 (B. L.), Tjølling (Høeg), Malmoen (B. L.), Larvik (Norm.). Busk. Modum 

 (Moe), Kongsberg (Poulss.). 



Aiistagd. Lyngør (B. L.). J'cstagd. Evje (Sor.), Mandal: Skjernøen 

 (B. L.). Rog. Egersund (H.). 



Hard. Strandebarm: Tangeraas (Lillef.), and Skagesol (Lillef.), Lygre- 

 fjorden (H.), Granvin (FL), \'oss: Hanger (B. L.); 'frequent at the tjords, 



