l8o HF.RNT LYNGE. M.-N. Kl, 



3*. I li.illiis llavcsrcns. 



4. Tliallns tiihiilosLis 8. C. alvarensis. 



4*. l'lialliis foliaceus vel (Vulirulosiis. 

 5. Thallus erectus. 



6. Thallus basi rubescens, margines conniventes 



9. C. ciicitllata. 

 6*. 'Phallus basi non rubescens, concavus. 



I o. C. nivalis. 

 5*. Thallus margine + adscendens, sed non erectus. 

 6. Thallus niargine sorediatus 11. C. cap(r<il<i. 

 6*. Thallus sorediis destitutus 12. C. jiinipcriun. 



3**. Thallus glaucescens. 



4. Thallus reticulato-rugosus, medulla J caerulescens. 



13. C. Inciinosa. 

 4*. Thallus non reticulato-rugosus, medulla J immutata 



14. C. glaiica. 

 3***. Thallus fuscescens vel nigrescens. 



4. Corticola vel lignicola. 



5. Thallus fere semper apotheciis instructus 



15. C. sacpincola. 

 5*. Apothecia rarissima 16. C. chlorophylla. 



4*. Saxicola. 



5. Thallus apprcssus, foliaceus. 



6. Pycnoconidia ellipsoidea, thallus subtus fuscus. 



17. C. fahliiiietisis. 

 6*. Pycnoconidia apice incrassata, thallus subtus ater 



18. C. hcpatizon. 

 5*. Thallus pulvinatus, laciniae ciliis longis instructae 



19. C. nigricans. 



1. Cetraria islandica (L.) Ach. 



Øsi/. LarkoUen (B. L.), Eloen (B. L.), Jeloen (B. L.).' Akers/i. Åker 

 very frequent (M. N. Bl., Moe a. o.), Bærum: Kai veen (Kiær), and Kolsaas 

 (B. L.), Nordmarken very frequent (B. L.), Hersjoen (B. L.), Minne (B. L.). 

 Vest/. Holmestrand (B. L.), Nottero (B. L.), Yasser (B. L.), Larvik (Norm.), 

 Tjølling (Høeg), Ula (B. L.). Busk. Roken (Somrft.), Honefoss (B. L.), Hen 

 (B. L.), Kongsberg (Poulss.), Krekling (B. L.), Hol (B. L.). 



Te/cm. Brevik (B. L.), Bolkesjo (Kler), Gausta 1826 (M. N. Bl.). .4iisf- 

 agd. Lyngør (B. L.), Nergaren (B. L.). J^csfagd. Mandai: Risobank (B. L.), 

 and Skjernoen (B. L.). Rog. Stavanger (MoeI. 



Hord. Moster (H.), Løvstakken (H.), Granvin (H.l, Hardangervidda: 

 Fagerlid (H.), Graoberg (H.), and Haarteignuten, summit, 1690 m. s. m. (H.). 



