TIIK BOTANY OF GOUGH ISLAND. 43 



LlCHENES. 



By 0. V. DARBISHIRE, B.A., Ph.D. 



The following is an enumeration of the 7 species of lichens brought from Gough 

 Island by the Scottish National Antarctic Expedition, and collected there by Mr R. N. 

 Rudmose Brown in April 1904. Of the 7 species 5 are already known as being 

 Arctic and alpine plants : 



CLADONIA SQUAMOSA, Hoffm. Deutsche FL, ii. 152. 



Cosmopolitan, but not Arctic. This plant was found in small quantities. 



PARHELIA CETRATA, Acli. Syn. Mcth. Lick., 198. 



This species was found growing on branches of Phylica. It is most commonly met 

 with in more temperate parts of the world, but I do not doubt that the specimens 

 before me, though sterile, do belong to this species. 



PARMELIA SPH^ROSPORELLA, Muell. Arg. in Flora, Ixxiv. (1891) 378. 



This specimen is small and incomplete, but both in internal structure and external 

 appearance it corresponds to the original specimen and description of J. Miiller 

 Argoviensis. He records its occurrence in the hills of Oregon. 



USNEA BARBATA, Fries, Sched. Crit. Lich. Suec., 34. 



A number of good healthy specimens, all sterile, were brought back from Gough 

 Island. No attempt has been made to separate out the varieties of this species. It is 

 found in every part of the world, being common also as an Arctic plant. 



RAMALINA SCOPULORUM, Ach. Lich. Univ., 604. 



Arctic, in Europe, Asia, and America. Gathered from rocks, and in full fruit. 



PHYSCIA STELLARIS, Nyl. Syn., 424. 



Another cosmopolitan plant, but not typically alpine. A small specimen found 

 growing with Parmelia cetrata on stems of Phylica. 



STICTINA FULIGINOSA, Nyl. Syn., 347. 



Fairly common in all continents except Asia. Only a small specimen of this 

 plant was collected on Gough Island, and it belongs, I think, to this species. 



The collection also contains some fragments of a Parmelia plant, one of which 

 might be Parmelia saxatilis, Ach., but they are too imperfect to admit of precise 

 identification. 



LIST OF REFERENCES. 



CARMICIIAEL, Captain DUGALD. "Some Account of the Island of Tristan da Cunha and its Natural Produc- 

 tions," Trans. Linn. Soc. Land., vol. xii., 1818, pp. 483-513. 



HEMSLEY, W. BOTTING. Report on the Voyage of H.M.S. " Challenger," 1873-76, i. n. (1885), pp. 133 

 et stq. 



