86 LICHENES. [Cornicularia. 



expansion of the buds on one plant above another, even in the same 

 tuft, sometimes yields a closely pinnate appearance, giving origin to 

 another variety. When growing pendulous, the branches are more lax 

 and elongated, and the ultimate divisions capillaceous, which is a source 

 of another variation. 



1. U. plicata, Ach. Thallus pendulous, smooth, pale ; the 

 branches loose, much divided, subfibrillose, the ultimate ones 

 capillaceous ; apothecia plane, broad, ciliated ; the cilia slender 

 and very long. Ach. L. Un. p. 622. Eng. Bot. t. 257. /3. hirta ; 

 nearly erect, scabrous with buds. Ach. L. Un U. plicata, B. hirta, 

 p. 623. Eng. Bot. t. 1854. 7. barbata ; thallus articulate. Ach. 

 L. Un.p. 624. Eng. Bot. t. 258, /. 2. 0. florida ; thallus nearly 

 erect, horizontally and closely pinnate. Ach. L. Un. p. 620. 

 Eng. Bot. t. 872. 



On aged trees and bushes ; also on rocks. Mr. Templeton 

 found S. near Belfast ; 7. grows on the sand hills at Portmarnock, 

 near Dublin ; the others are common. 



11. Alectoria, Ach. 



Thallus cartilaginous, the branches subfiliform, subfistulose, 

 cottony within. Apothecia orbiculate, thick, marginate, at 

 length convex and losing the border, entirely formed of the 

 thallus, and of the same colour. 



1. A. jubata, Ach. Thallus tufted, pendulous, much 

 branched, olive-brown, shining. Apothecia of the same colour 

 as the thallus, at length convex, the margin entire. Ach. L. 

 Un. p. 592. Eng. Bot. t. 1880. 



On rocks at Knockcurris, in Innishowen, Mr. Robert Brown. At 

 Lough Bray and the Killiney Hills. I quote the apothecia from 

 Acharius, having never seen them. The buds are remarkable for 

 their size, being wider than the stems ; they contain a glaucous 

 powder. 



12. Cornicularia, Ach. 



Thallus cartilaginous, branched, nearly solid, cottony within. 

 Apothecia orbiculate, obliquely peltate, entirely formed of the 

 substance of the thallus, and of the same colour. 



1. C. tristis, Ach. Thallus branched, nearly erect, shining, 

 compressed, rough on the edges with blackish buds ; branches 

 fastigiate ; Apothecia flattish, deep-brown, the margin rough 

 with buds. Ach. L. Un. p. 610. Eng. Bot. t. 720. 



On the higher mountains ; not uncommon. Tufts half an inch 

 high, very rigid. The degree of expansion of the buds gives the 

 apothecia more or less of a radiate appearance at the margin. 



2. C. aculeata, Ach. Thallus tufted, rigid, of a dark ches- 

 nut colour, much branched, compressed, lacunose at the angles, 

 the branches flexuose, divaricated, spinulose at the ends; apothecia 



