162 THE VOYAGE OF ELKS. CHALLENGER. 



Carmichael states that it grows indiscriminately on the dome, the face of the tableland, 

 and the plain ; and that it attains a length of several fathoms. Further he says that the 

 leaves end in a white filament, which gives the plant, in the fresh state, a silky feel. 



Lycopodium magellanicum, Swartz. 



Lycopodium magellanicum, Swartz, Synop. FiL, p. 180; Desv., Ann. Soc. Linn. Par., vi. p. 184; 

 Spring, Monogr. Lycopod., partie 1, p. 96, partie 2, p. 46 ; Carmicli. in Trans. Linn. Soc. Lond., 

 xii. p. 509 ; Kuhn, FiL Afr., p. 185. 

 Tiustan da Cunha. — On the side of the dome — Carmichael. 



Common in the cold temperate zone of the southern hemisphere wherever there is land. 

 In a broad sense this is only a variety of the generally diffused Lycopodium clavatum, 

 Linn. 



Lycopodium saururus, Lam. 1 



Lycopodium saururus, Lam., Encycl. Lot,, iii. p. 653; Swartz, Synop. FiL, p. 176; Spring., Monogr. 



Lycopod., partie 1, p. 21, et partie 2, p. 6. 

 Lycopodium insulare, Carmicli. in Trans. Linn. Soc. Lond., xii. p. 509. 

 Lycopodium azillare, Roxb. in Beatson's St Helena Tracts, p. 312. 



Tkistan da Cunha. — On the sides of the ravines — Carmichael. Nightingale 

 Island. Moseley. 



A very widely dispersed species. See the remarks on it in the preceding account of 

 the plants of St Helena (p. 91). 



FILICES. 

 POLYPODIEyE. 



Hymenophyllum 8eruginosum ( Carmicli. (Plate XXXVIII.) 



Hymenophyllum aemginosum, Carmicli. in Linn. Trans. (1818), xii. p. 513 ; Desv. in Mem. Soc. Linn., 

 Par., 1822-27, p. 332 ; Hook., Sp. FiL, i. p. 94, exoL var. /3 et t. 34, A. ; Hook, and Bak., Synop. 

 FiL, p. 64; Kuhn, 5 FiL Afr., p. 38. 



Trichomanes ceruginosum, Poiret in Lamarck, Encycl., viii. p. 76; Thouars, Esquisse Fl. Trist., p. 34. 



Tristan da Cunha. — Endemic. Thouars; Carmichael; MacGfillivray ; Moseley. 

 Hymenophyllum ceruginosum is most nearly allied to Hymenophyllum Jranklinianum, a 



New Zealand species, and Hymenophyllum lanceolatum and Hymenophyllum obtusion, the 



1 Spring referred Li/rnjunliiiin insulare, Carmicli., and Lycopodium axillare, Koxb., to Lycopodium selago, 

 Linn. var. spinulomm } Spring ; and Kuhn (FiL Afr., p. 186) follows him ; but Baker (MSS. in Herb. Kew)refers 

 them to the present species. 



'-' Kuhn (FiL Afr., p. 38) cites Trichomanes hirsutum, Thouars, as a synonym of Hymenophyllum capH- 



lnr> , 1 lesv. (Hymt nophyllutn Mm art , Swartz), a species not found in the Tristan da Cunha group. It is clear, 



however, that Thouars had only one species in view, and although he described it as new and named it Tricho- 



ceruginosum, he thought it might be the same as Triclwmanes hirsutum, Linn., hence he added Linnseus' 



name and diagnosis with a note of interrogation. 



