8o4 CRYPTOGAMIA AL.G7E. 



Upon calcareous rocks frequent, as on thofe to the 

 eaft of the Hermitage^ and on the Pentland hills, 

 &c. 



This differs very little from the preceding, when 

 that grows upon rocks, as it often does as well 

 as this. It may, however, be readily enough 

 diftinguifhed by its hard, fmooth, white, ftoney 

 or tartareous crufl:, crack'd or teflellated on the 

 furface. The tubercles are black, and very like 

 thofe of the laft. 



Dillemas relates, that this Lichen is ufed in dying 

 a red colour, in the fame manner as the L. tar- 

 tiireii\ hereafter mentioned ; and I doubt not 

 but the fore.ooino; would anfwer the fmie inten- 

 tion, when found upon rocks-, neither do I think 

 that the gatherers diftinguifh between them. 



f'Jco ater T. leprofus fufcus, tuberculis atris. Sp. -pi. 1607. 



Blacic-nobb'd fufcous Lichen. AngUs. 

 Upon rocks, often mix'd with the foregoing. 

 The cruft of this is brown or fufcous. In otiier 

 refpeds it differs but very little from the preced- 



atro-cdh.s L' leprofus niger, tuberculis atro alboque mixtis. 

 9. Syft. nat. f. 805. edit. 13. Sp. p. 1607. {Fig. 



nulla.) 

 Black and white mix'd Lichen. Anglis. 

 Upon rodcs, and often on pCat earth. 



The 



