48 BERNT LYNGE. M.-N. Kl. 



wanting or shrunk and morbid, of a rather constant size, but variable 

 exterior: straight or somewhat fabiform, ellipsoidical or with one contour 

 somewhat flattened, they are rounded at the ends and not constricted at 

 the septum. Cell room rounded, rarely angular, canal indistinct. Colour 

 greyish-brown, normal spores rather translucent. Size 1520 (23,6) n 

 long, 8,4 nit thick. 



Pycnides rare, fertile ones very rare, they are orbicular or later flat- 

 tened, size 120 160 fi in diam. In young, fertile pycnides the perifulcrium 

 and the adjacent parts of the cortex are black about the ostiolum, otherwise 

 the perithecium is pale, greyish or greyish-brown, in age dark. Pycno- 

 conidia straight, cylindrical or narrowly fusiform, 2 4 fi long. 



React. No colouring by CaCUO^, cortex yellow, medulla unco- 

 loured by KOH 1 . Hymenium first blue by J, then at once sordid red, 

 asci subpersistently blue. (On account of the very numerous asci the 

 change of colour is easily overseen in thick sections). 



Hab. The habitats of this species is entirely determined by its 

 extreme need of Nitrogen. In the mountains it is an or nithoco pro- 

 phi lo us species, found everywhere on large stones, prominent rocks &c., 

 where the birds like to rest, associated with the never-absent Xanthoria 

 lychnea, also with Ratnalina strepsilis, Parmelia sulcata and other species. 

 It is frequent on roadside curb-stones (Norw. stabbesten), also at the 

 shores of lakes where organic material is deposited during flood-time, on 

 the stone walls under stables &c. Also frequent on suitable wood if the 

 supply of nitrogen is sufficient: wood-fences along the roads, on eaves of 

 birch-bark, on stables (lower part), and in secluded places of different kinds 

 in the country. One of the few Physciae, found on Betnla. 



Loc. Curiously enough this conspicuous species has been overlooked 

 by most collectors in our country, and its distribution therefore is insuffi- 

 ciently known. It is not frequent (or overlooked) in the lowlands, but 

 frequent in subalpine positions and very abundant on the mountains; it 

 ascends as high as a Lichen can grow, almost to the eternal snow. There 

 was only one specimen in the herbarium from other collectors, but I have 

 found it almost everywhere on my travels in Norway: Continuously 

 distributed in Eastern Norway from Reros along the lake Faemunden, 

 Engerdalen and Trysil to Rena, also at Minne. Central Norway: Dovre 

 (ZETTERSTEDT, hb. Ups.); continuously distributed along the Bergen railway, 

 investigated from Hoi to Voss : Hoi, Gjeilo, Finse, Mjelfjell, Voss. Re- 

 corded from Eide at the inner end of the Hardangerfjord near the quay, 



There is, however, a specimen from Assebakte, Karasjok in Finmarken with a positive 

 medullary reaction. 



