• CRYPTCGAMIA ALGJE, 815 



This Lichen fpreads flat upon the rocks in a cir- 

 cle from two to fix inches in diameter, compofed 

 of many pale whitifli green leaves, runnlnir 

 from the centre to the circumference, variouflv 

 branched, and gradually dilated as they rectde 

 from the centre, the branches laciniated on the 

 edges, contiguous to, and lying over, the fides 

 of each other, and obcufely lobed, and crenated 

 at the extremities. Thelc leaves are black un- 

 derneath, and adhere to the rocks by fome very 

 fliort hairs or radicles, fcarcely perceptible. 

 The frudificatlons are chefnut colour'd flilelds of 

 various fizes, their margin and under fides of 

 the fame colour as the leaves. The central 

 fiiieldi are the largefl, being often of the fize of 

 a filvcr penny, and frequently waved on tlie 

 edges •, the others grov/ gradually fmaller to- 

 wards the circuniference, till they dwindle to a 



'" ' point. The centre of the circle often confiils 



only of minute furfuraceous leaves, which de- 

 cay fird, while thofe in the circumference fti;] 



""' remain, and conftitute a broad circular band. 



cartllagine' L. imbricatus, foliolis crenatis pallidis carti.'agineis 

 Ui 27. fcutcUis planis fulvis. (DiHen. jnufc. l. 24./, y.\ 



Cartilaginous Lichen. Auglis. 

 Upun rocks thinly covered Vv'ith earth, not unfrc- 



quent, as in the king's park, &c. 

 The leaves are fmall, ftiff", thick, and cartilao-i- 

 nous, laciniated, and obtufely lobed at the ends, 



of 



