72 CRYPTOGAMIA LICHENES. 



( 1 1" Shrubby, the branches cylindrical or filiform. 



50. CORNICULARIA. Frond erect, branched, fibrous, and nearly 



solid within. Apothecia terminal, obliquely peltate, at 

 length convex, somewhat inflated, the border toothed. 



51. ALECTORIA. Frond pendulous or prostrate, much branched, 



the branches filiform, fibrous and somewhat fistulose with- 

 in. Apothecia shield-like, thick, sessile, wholly formed 

 from the frond. 



52. USNEA. Frond mostly pendulous, much branched, furnished 



within with a bundle of elastic fibres. Apothecia terminal, 

 peltate, often ciliate at the border, wholly formed from the 

 frond. 



* * Apothecia coloured tubercles terminating the branches, or raised on 

 a stalk. 



53. CENOMYCE. Frond either branched, shrubby, and fistular, or 



depressed, foliaceous, and lobed, with erect, somewhat hol- 

 low stalks, cupped at the top. Apothecia coloured tuber- 

 cles on the tips of the branches, or clustered on the mar- 

 gins of the cups. 



54. SPH^EROPHORON. Frond shrubby, branched, solid. Apothecia 



covered with the substance of the frond, bursting irregu- 

 larly, and containing a black pulverulent mass. 



55. BCEOMYCES. Frond crustaceous, spreading, adnate. Apothecia 



solid tubercles terminating a short, solid, simple stalk. 



56. ISIDIUM. Frond crustaceous, plane, spreading, adnate. Apo- 



thecia on very short solid stalks, the disk somewhat im- 

 mersed, having a border formed from the substance of the 

 stalk. 



* * * Apothecia in the form of waved orflexuose lines. 



57. GTROPHORA. Frond foliaceous, peltate, mostly monophyl- 



lous, free beneath. Apothecia subscuteliform, sessile or ad* 

 nate, covered with a black cartilaginous membrane, the 

 disk warty, or plaited in circles, and bordered, 



