^^12 CRYPTOGAMIA ALC.E. 



Corcar. GauUs. 



Upon rocks frequent, both in the highlands and 

 . lowlands. 



The cruft is thick and tough, either white or 

 greeniih- white, and has a rough, wartcd fur- 

 face. The fhields are yellow, or buff-colour'd, 

 of various fizes, from that of a pin's head to 

 the diameter of a filver penny. Their margins 

 are of the fame colovir as the cruft. 



This Lichen is much ufed by the Highlanders in 

 dying a fine claret or pompadour colour. 



For this purpofe, after fcraping it from the rocks, 

 and cleaning it, they ftcep it in urine for a quar- 

 ter of a year. Then, taking it out, they make 

 it into cakes, and hang them up in bags to dry. 

 Thefe cakes are afterwards pulverized, and the 

 powder is ufed to impart the colour, with an 

 . addition of allum to fix it. 



•paUefcens L. cruftaceus albicans, fcutellis pallidis. Sp, pi, 

 22. J 608. (Diilen. mufc. /. 1 8. /. 1 7. A. B.J 



Pale glaucous Lichen. Anglis. 

 Upon walls and rocks common, and fometimes 



upon the bark of trees. 

 The cruft is of a grey or bluilh white colour, 

 fpreading clofely to the fubftance on which it 

 grows in the form of a circle, one, two, or three 

 inches in diameter, wrinkled and lobed at the 

 circumference, fo as to emulate fmall united 

 itaves. in the centre of this cruft is often found 



a greenifh 



