170 



POPULAR HISTORY OF LICHENS. 



much less common than P. canina. We have seen fine 

 specimens, with very large apothecia, from Switzerland. It 

 is spread over central and northern Europe and North 

 America, and occurs in Kerguelen's Land in the Southern 

 hemisphere, and in the Arctic regions. 



6. Peltigera rueescens {rufesco, to become red) resem- 

 bles, and grows sparingly along with, P. canina, than which 

 it is smaller and thicker ; its lobules are somewhat narrow, 

 with elevated and crisped margins, and its apothecia are 

 vertically adnate, oblong, and revolute. (E. B. 2300.) 



7. Peltigera sylvatica (sylva, a wood) differs remark- 

 ably from preceding species in the presence of urceolate, 

 white cyphellse on the lower surface of the thallus, which is 

 non-fibrillose ; its upper surface is covered with soot-coloured 

 granules or granular masses ; extremities of thalline lobes 

 bifid or trifid ; the apothecia are brownish-red, oblong-round, 

 but appear only to have been found in Britain by Dr. Bur- 

 gess, as mentioned in the ' English Botany' (Schserer states, 

 "jprater Dillenium et Leersium a nemine visa"). 



It grows about the mossy roots of trees and on the ground 

 and stones, in subalpine and alpine woods. It occurs about 

 the Palls of Clyde, Palls of Moness, Inverary, Glencoe, and 

 other parts of the Highlands. With the older Lichenologists, 



