REPORT ON THE BOTANY OF THE ATLANTIC ISLANDS. 109 



Fragments only, and doubtfully belonging to this species. 



West Indies ; South America ; Africa ; Mascarene Islands ; Southern Asia ; Australia ; 

 New Zealand ; and the Antarctic Islands. 



Roccellei. 

 Roccella tinctoria, DC. 



Roccella tinctoria, DC. ; Nyl., Synop. Lich., i. p. 258 ; Leighton in Trans. Linn. Soc. Lond., xxvii. p. 



155, et in Melliss's St Hel., p. 373. 



St Helena. Melliss. 



Canary Islands ; Senegambia ; Cape of Good Hope ; East India ; Central and South 

 America ; and also in the islands of the Mediterranean Sea ; but here, according to 

 Nylander, represented by a form approaching Roccella phycopsis. 



Roccella phycopsis, Acharius. 



Roccella phycopsis, Acharius; NyL, Synop. Lich., i. p. 259; Leighton in Trans. Linn. Soc. Lond., 

 xxvii. p. 155, et in Melliss's St Hel., p. 373. 



St Helena. Burchell; Melliss. 



Mediterranean ; Western Europe ; Canaries ; Ascension ; Peru ; and Madagascar. 



Roccella fuciformis, Acharius. 



Roccella fuciformis, Acharius; NyL, Synop. Lich., i. p. 260; Leighton in Melliss's St Hel, p. 373. 



St Helena. Melliss. 



Mediterranean ; Western Europe ; Canaries ; South America ; Western and South 

 Africa ; and Mauritius. 



Usneei. 

 Usnea barbata, Fries. 



Usnea barbata, Fries; Nyl., Synop. Lich., i. p. 267 ; Leighton in Trans. Linn. Soc. Lond., xxvii. p. 



156, et in Melliss's St Hel., p. 374 (formae : florida, hirta, ceratina, et articulata). 



St Helena. Burchell ; Melliss. 

 Generally diffused. 



[Usnea leucochlora, Bory in Duperr. Voy. " Coquille," Bot. Crypt., p. 241, St Helena, 



Durville, is unknown to us.] 



Usnea laevis, Nyl. 



Usnea Icevis, NyL, Synop. Lich., i. p. 271 ; Leighton in Trans. Linn. Soc. Lond., xxvii. p. 271, et in 

 Melliss's St Hel., p. 374. 



St Helena. Burchell. 



