LICHENES. 125 



7. U S N E A, DHL, Ach. 

 1. Usnea barbata, [Linn.) Fr. 



Lichen barbatus & L. Jioridus, Linn. & Auctt. 

 Usnea barbata, Fr. Lichenogr. p. 18. 



Var. a. FLORIDA, Fr. 1. c. 



Hab. Andes of Peru. Organ Mountains, Brazil. Rio Janeiro. 

 Hawaii, Sandwich Islands. Tahiti. New Zealand. Sydney, New 

 South Wales. 



Var. d. dasypoga, Fr. 1. c. 



Hab. Pico Ruivo, Madeira. Ernio, Society Islands. Tonga. Sa- 

 moan Islands. What appears to be a smoother variety from Ovolau, 

 Feejee Islands ; and a similar Lichen from Fuegia. 



Var. e. articulata, Fr. 1. c. 



Hab. Pico Ruivo, Madeira. 



2. Usnea aurantiaco-atra, Jacq. (Tab. 1, fig. 1.) 



Lichen aurantiaco-ater, Jacq. Miscell. 2, tab. 11, fig. 2, cit. Ach. 



Usnea melaxantha, Ach. Meth. p. 307, & Syn. p. 303; Montag. Pol. Sud. p. 201 ; 



Hook. f. Bot. Antarct. Voy. t. 2, p. 519. 

 Neuropogon melaxanthus, Nyl. Enum. 1. c. p. 98. 

 Usnea sphacelata, R. Br. in Parry's 1st Voy. Append, p. 307 ; Hook. Bot. Miscell. 1, 



p. 15, t. 12. 

 Usnea fasciata, Torr. in Amer. Journ. Sci. 6; Hook. 1. c. p. 14, t. 11. 



Hab. Fuegia. — Original specimens of the Lichen upon which U. 

 sphacelata, was founded, from Melville Island (Herb. Ch. Babington), 

 and others, not distinguishable, from Spitzbergen, given to me by the 

 late Dr. Vahl, appear to differ only in their dwarf habit from the 

 Antarctic plant. The latter was first published ; nor does there seem 



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