t^o CRYPTOGAMIA ALCS.^:. 



der on the margins, there are fomeirimcs found 

 in the fame fpecimens, but more commonly in 

 dijiin^ ones, upon the difc of the leaves, many 

 plain farinaceous tubercles. 



The fhields are very rarely hen^ notwithftanding 

 the plant is fo common. 



They are large, concave, and fupported on fhort 

 peduncles. Their infide is fmooth and fufcous, 

 their outfide of the colour of the leaves, wrin- 

 kled in the dry plants, fmooth in the frcfh ones, 

 and their margins lobed in the old ones. 



Hence it appears that this differs chiefly from the 

 preceding in not having the upper fide of the 

 leaves glolTy, in havjng their under fides hairy, 

 their margins elevated and tumid with Farina^ 

 and in producing fometimcs, tho' very rarelv, 

 large fhields, fupported on Ihort peduncles, 

 which have never yet been difcovered in the 

 former. 



i-efperti:io L. gelatinofus membranaceus rugofus lobatus atro- 

 52. virens, fcuiellis copfertis rufis. L. nigrefcens. 



Hudf. Fl. Jng. 4^0. {Dillen. mufc. /. 19. /. 20. 

 opt.) 



Bat's-wing Lichen. Jnglis. 



On trunks of trees frequent, cfpecially on the 

 north fide, and fometimes upon rocks. 



This confifts of thin, wrinkled, membranaceous^ 

 and gelatinous leaves, expanded in a circle, of 

 a black green colour, rcfembling a bat's wing, 

 " ■ ' flighily 



