7 CRYPTOGAMIA LICHENES. 



each patch is about an inch, but two or three often grow 1 

 in contact. Our specimens have no apothecia. 



2. C. melcenum,) " orbicular, substellate, imbricated ; lobes torn 

 and laciniate, with raised, waved, crisped and crenulate margins ; 

 fructification marginal, plane, similar in colour to the frond, with 

 the border granulated." HOOK. Scot. ii. 71. GREV. Fl. Edin. 350. 

 Lichen marginalis, Eng. Bot. t. 1924. 



Hob. On shaded walls near Berwick, growing with mosses, 

 plentiful. 



Grows in subcircular thick patches of a blackish-green colour, 

 very conspicuous and somewhat gelatinous in moist wea- 

 ther. The apothecia are rather large, and, in all the spe- 

 cimens we have seen, of a brown colour. 



3. C. nigrum, " frond crustaceous, roundish, brown-black, lobes 

 of the circumference cut and crenate, the central granular ; apo- 

 thecia becoming convex, black-edged.* 9 Loud. Encyclop. No. 

 15668. 



Hab. On the ground in firm gravelly places, and on shaded 

 walls with the preceding. Sandstone quarry at Huds- 

 head. Footpath near the Old-Castle. 



Our specimen precisely resembles that of C. nigrum preser- 

 ved in MOUGEOT and NESTLER'S collection. The patches 

 which it forms are thinner than those of the preceding ; 

 and the apothecia are much smaller and much more nu- 

 merous, convex, and of a dull brown colour. 



44. BORRERA. 



1. B.furfuracea, upper surface ash-grey, farinaceous ; the under 

 very black. HOOK. Scot. ii. 56. Lichen furfuraceus, LIGHTF. 

 Scot. 832. WITH. iv. 60. Eng. Bot. t. 984. Parmelia furfur acea> 

 SPRENG. Syst. Veg. iv. 281. DILL. Muse. t. 21. f. 52. 



Hab. On the wall of Chillingham Park at Rawse Castle, 

 plentiful. 



The fronds grow loosely, spreading or decumbent," in large 

 roundish tufts, and are much branched ; the branches li- 

 near, dichotomous, convex above, and of a nearly ash-grey 

 colour, beneath channelled, wrinkled and black, the apices 

 being reddish-orange ; the apothecia were not observed, 



