192 1. No. 7. STUDIES ON THE LICHEN FLORA OF NORWAY. 9 1 



some Umhilicaria piistiilata specimens. The smaller specimens are less 

 perforate. The large plants are distinctly reticulato-rugose, but the rugi 

 are lower than in the type, and quite as well developed near the margin 

 as at the centre. 



I will give this EUesmereland Gyropliora a special name: Gyrophora 

 discolor f. perforata n. f. 



4. Gyrophora corrugata (Hoffm.) Ach. 



Gyrophora hctcroidca b. corrugata Ach. Lieh. Uni\-. p. 219 ('sub no- 

 mine Unibilicariac corriigatac Hoffm. ad me missa' Ach. 1. c). 



Sortr. Dovre (Boeck et Torssell), Roros (Hellbom). Nordtr. Sylene: 

 Nedalen (Nordh.). 



Th. Fries referred corrugata to G. hyperborea, but I think Nylander 

 is right in considering it a proper species ILich. Scand. p. 119: 'ni fallor 

 propria species'). Cfr. also Wainio Lieh. Cauc. p. 274. 



It varies considerably as to size: Hellboms specimens from Roros are 

 large (6 — 7 cm.), \'rang's from the same station small and pulvinate ( i — 1.5 

 cm.). — NoRDHAGEN brought home a fine suite from Svlene. His plants 

 are of medium size, 1.5 — 2.5 cm., monophyllous, very rigid, trabeculately 

 rugose, coarseU" papillose and whitish-grey on the upper side; the under 

 side is as black as soot. 



The habitus of these plants is very like Gyrophora discolor, but they 

 are much more rigid, the rugi are coarser, the thallus papillose and the 

 colour of the upper side greyish-white, G. discolor is darker. 



Lmbilicaria corrugata Lojka Lieh. Univ. 69 is not this species. 



5. Gyrophora erosa (Web.) Ach. 



øst/. Hvaler (B. L.). Akcrsh. Drobak (B. L.), Nesodden (Moe), Eke- 

 berg (Moe), Kolsaas (H.). Vest/. Yasser: Sandøen (B. L.), Larvik (Norm.). 

 Busk. Nordmarken: Fyllinga (B. L.), and Gyrihaugen (B. L.), Hol: Odnak 

 (B. L.), Haugastøl: FoUaskaret (B. L.); Jondalen (Somrft.). 



Tcloti. Brevik (B. L.), Tinn: Myrdalssæter (Kiær), and Krokan (Kiær). 

 Austagd. Lyngør (B. L.), Evje (Sør.), B\'gland: Aardalsnuten (Sør.). 



Hord. Moster (H.), Fitjar: Aalforo (Lid), Strandebarm: Tangeraas 

 (Lillef.), Granvin: Skaalsæte (H.), Haarteignuten: summit (H.), Voss: Lone- 

 horgje 1424 m. s. m. (B. L.), Torfinnsdalen (Lin), Finse: Kirkesdornuten 

 (Nordh.). Sogn. Myrdal (B. L.). 



Opl. Lillehammer: Næverfjell (B. L.), Gjeiteryggen (Zett.), Snehætta 

 (Zett.), Vaage: Graahø (B. L.), Lom: Kjaestad (B. L.), Valders: Kvamskle- 

 ven (M. N. Bl.). 



