166 THE VOYAGE OF H.M.S. CHALLENGER. 



Asplenium lunulatum, Swartz. 



Asplenium lunulatum, Swartz, Synop. FiL, p. SO; Hook, and Bak., Synop. Fil., p. 202. 

 Asplenium erectum, Lory in Wilkl. Sp. PL, v., p. 328; Hook., Sp. Fil., iii. p. 126, t. 178. 

 Asplenium iusulare, Carmich. in Trans. Linn. Soc. Lond., xii. p. 512. 

 Asplenium marimtm, Linn. ? Tliouars, Esquisse Fl. Trist., p. 31. 



Tristan da Cunha. — In the wood — Carmichad. Inaccessible and Nightingale 

 Islands. Moseley. 



The form found in these islands of this variable and widely dispersed fern is quite 

 small, having fronds only three to five inches long. For more extended synonymy and 

 distribution, see the enumeration of St Helena plants (p. 95). 



Asplenium monanthemum, Linn. 



Asplenium monanthemum, Linn., Mant., i. p. 130 (monanthes) ; Murr., Syst. Veg., ii., 2, p. 1302 

 (monanthemum); Forst., Comment. Gcett. ix. p. 73 (reprint, p. 63); Smith, la, ined., t. 73; 

 Hook., Sp. Fil., iii. p. 140; Hook and Bak., Synop. Fil., p. 197; Kuhn, Fil. Afr., p. 107; 

 Carmicli. in Trans. Linn. Soc. Lond., xii. p. 512. 



Tristan da Cunha. — In ravines — Carmichad; Moseley. 



Common in America, from Arizona, Mexico, and West Indies to Chili ; in Madeira, the 

 Canaries, and other African islands, including Fernando Po ; also in Abyssinia and South 

 Africa. 



Asplenium (Athyrium) medium, Hook. 



Asplenium {Athyrium) medium, Hook., Sp. Fd., iii. p. 227; Hook, and Bak., Synop. Fil., p. 225; 



Hook., 2nd Cent. Ferns, t. 43; Kuhn, Fil. Afr., p. 106. 

 Aspidium medium, Carmich. in Trans. Linn. Soc. Lond., xii. p. 511. 

 Afltyriwn medium, Moore, Ind. Fil., ii. p. 96. 

 Aspidium intemubium, Carmich., MSS. in Herb. Kew. 



Tristan da Cunha. — Endemic. On the tableland — Carmichad,. 



A well-marked species, of which we have only seen the specimens collected by Car- 



michael in 1816. 



Asplenium pyramidatum, Desv. 



Asplenium pyramidatum, Desv. in Ann. Soc. Linn., vi. p. 271 ; Mett., Aspl., n. 81, b; Moore, Ind. 

 FiL, p. 159; Hook., Sp. Fil., iii. p. 164; Kuhn, Fil. Afr., p. 114. 



Tristan da Cunha 1 



This is a doubtful plant of uncertain origin. 



Diplazium proliferum, attributed to Thouars by Kuhn (Fil. Afr., p. 112), is a name 

 not mentioned by the former. It is a synonym of Asplenium decussatum, Swartz, a species 

 having a wide range, though hitherto not found in South Africa nor in the Tristan da 

 Cunha group. 



