186 



POPULAR HISTORY OP LICHENS. 



branaceous, — above greyish or brownish, smooth, often mar- 

 gined by grey soredia, — below ochroleucous or greyish-to- 

 mentose ; cyphellse plano-concave ; laciniae rotundate-lobate ; 

 lobes entire or crenate; apothecia superficial. (E. B. 1104.) 



A small form growing on mossy trees and rocks, in moist 

 shady places, as about the Falls of Clyde and the shores of 

 Loch Lomond. 



4. Sticta puliginosa (fuligo, soot) is distinguished 

 chiefly by the fuliginose-furfuraceous character of the upper 

 surface of the thallus, and by the apothecia having a ciliate- 

 radiose margin, with fugacious cilia. 



Not a very common species, growing among moss chiefly 

 on moist rocks, as at the Falls of Clyde, or on trees, as 

 about Loch Lomond : it is rarely found in fruit. In general 

 appearance it resembles Peltigera syhatica, differing from it 

 chiefly in its rounded, rugose lobes, covered with an isidioid 

 or furfuraceous efflorescence, and in its normally sessile, 

 orbicular apothecia. 



5. Sticta macrophylla (/xa/c/>09, large), as its name 

 imports, is a very large-lobed form, which has been found 

 on rocks about the Turk Cascade, on the Turk Mountain, 

 and on Cromaghan Mountain in the vicinity of Killarney, 

 Ireland. It sometimes attains a diameter of a foot or up- 



