CRYPTOGAMIA ALG^. 815 



This Lichen fpreads flat upon the rocks in a cir- 

 cle from two to fix inches in diameter, compofcd 

 of many pale whitiih green leaves, running 

 from rhe centre to the circumference, variouHy 

 branched, and gradually dilated as they recede 

 from the centre, the branches laciniated on rhe 

 edges, contiguous to, and lying over, the fides 

 of each other, and obtulely lobed, and crenated 

 at the extremities. Thefe leaves are black un- 

 derneath, and adhere to the rocks by fjme very 

 fhort hairs or radicles, fcarceiy perceptible. 

 The frudtificatlons are chefnut colour'd fliields of 

 various fizes, their margin and under fides of 

 the fame colour as the leaves. The central 

 fnields are the hrgeft, being often of the fize of 

 a fiivcr penny, and frequently waved on the 

 edges ; the others grow gradually fmallcr co- 

 wards the circumference, till they dwindle ro a 

 point. 'I^he centre of the circle often confilh 

 only of minute furfuraceous leaves, which de- 

 cay fird, while thoie in the circumference ftijl 

 remain, and conftitute a broad Circular band 



L. imbricatus, foliolis crenatis pallidis cartilao-inejs 

 fcutcrllis planis fulvis. (Dillen. mufc. i. i^.f n^ ) 



Cartilaginous Lichen. Anglis. 



Upon ro.ks thinly covered with earth, not unfre- 

 quent, as in the king's park. 6cc. 



The leaves are fmall, ftilF, thick, and cartilagi- 

 nous, laciniated,. and obtufcly lobed at the ends, 



cf 



