8o4 Ci^YPTOGAMIA ALG7E, 



Upon calcareous rocks frequent, as on thofe to the 

 caft of the Hermifage, and on the Pentland hills. 

 &c. 



This differs very little from the preceding, wher 

 that grows upon rocks, as it often does as wel 

 as this. It may, however, be readily enougl 

 ditlinguifhed by its hard, fmooth, white, ftonc 

 or tartareous cruft, crack'd or teffellated on thi 

 furface. The tubercles are black, and very lik' 

 thofe of the laft. 



Dillemus relates, that this Lichen is ufed in dyin; 

 a red colour, in the lame manner as the L. tar 

 tareu% hereafter mentioned ; and I doubt nc 

 but the foregoing would anfwer the fame inter 

 tion, when found upon rocks ; neither do I thin 

 that the gatherers diilinguifli between them. 



fufco-aler L. Icprofus fufcus, tuberculis atris. Sp, pi. i6o' 

 JS. (Fig- nulla.) 



BlacK-nobb'd ^ufcous L'chen. AngUs. 

 Upon rocks, often mix'd with the foregoing. 

 The cruft of this is brown or fufcous. In oth 

 relpeds it differs but very little from the prece^ 

 ing. 



atroalhs L- leprofus niger, tuberculis atro alboque mixti 

 (^. Sy/i. nat. p. 805. edit. 13. Sp. pi. i6oj. (Fi^ 



nulla.) 

 Black and white mix'd Lichen. Jn^/is. 

 Upon rocks, and often on peat car;h. * 



N 



