824 CRYPTOGAMIA ALGiE. 



Jlellaris 36 L. imbricatus, foliolis oblongis laciniatis angullis, 

 cinereis, fcutcUis puUis. Sp.pl 16 11. {MideL 

 gen. L 43. ord, 23./. 2.Dillen.mufc.i. 24./. 70, 

 ^-C. ^/i'w hejie.) 



Starry Lichen. AngUs. 



Upon the bark of trees frequent. 



The leaves form a circle an inch or two in diame- 

 ter, of a grey glaucous colour when frefh, but 

 turning whiter when dry. They extend from 

 the centre to the circumference, gradually ex- 

 panded, and divided into many long, narrow 

 fegments, imbricated, or lying with their edges 

 over^another. They adhere clofely to the barl; 

 by black hairs on the under fide. 



The fliields grow in the middle of the circle, 

 the largeft in the centre, and gradually diminifh- 

 ing towards the circumference. When young 

 they are white or grey, being covered with a 

 thin, mealy pelhcle •, but as they enlarge and 

 grow older, the pellicle difappears, and they be- 

 come black, furrounded with a margin of the 

 fame colour as the leaves. 



Specimens are fom.ctim.es found having warts only 

 in the centre of the circle, and no ibields. 



There is a variety of this Lichen which forms 



larger circles, of four inches or more in dia- 



.r-X' liic leaves rue-colour'd when frefh, the 



■ 'US rnoie rigid, and not fo clofely united 



rxtremitiesj the Hiields larger, covered at 



firR- 



