CRYPrOGAMIA ALG^. 855 



Bur, as we have (ecn both on tlie fante individua!-, 

 and DillerAus has alio figured one in that ftatc, if 

 Micheli is right, and thele halls have any rela- 

 Jation to fex, this Lichen may be confidcred 

 more properly as polygamious. 



It is flrange that this fingular Lichen faould have 

 eicaped the obicrving eye of Linnj:us. 



jaccatus 64 L. coriaceus repens fiibrotundus, peltis deprefils 

 fubtus faccatis. Sp.pl 1616. {Mnbel. gen. t. 52. 

 ord. 31. ept. Dilien- miifc. i. 30. /. iii. Oeder. 

 Dan- sZ'^-f- 3 '^^^^J 

 Socket Lichen. Anglh. 



Upon the earth in the chafms of rocks that arc 

 damp and Ihadv, not unfreqiienrj eipecially in 

 the Highlands. 

 The leaves are about an inch long, often ]t;fs, 

 flightlv la-ciniatcd and obtufelyjobcd on the mar- 

 gins, of a fine glaucous green colour when re- 

 cent, and generally I'pread upon the ground in a 

 circular form. I'heir fubliance Is thin and ten- 

 der when frefh, but becomes more thick and 

 tough when dry. The upper Hdc is fmoofh., the 

 under one whitiih or tawny, abounding with 

 fibrous radicles. 



The fliields are of a black chefnut colour, deeply 

 ■ imprefs'd m the leaves, or funiv as it were in 



' fockets, which form tumors on the under fide. 



This circumRance alone diftinguifiies this fpecies 

 from all the reft of the e;enus. 



The 



