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



Lycopodium cernuum, Linn. 



Lycopodium cernuum, Linn., Sp. PL, ed 2, p. 1566; Swartz, Synop. Fil., p. 178; Bory in Duperr. 

 Toy. " Coquille," Bot. Crypt, p. 246; Spring, Monogr. Lycopod., partie 1, p. 79, partie 2, p. 

 37 ; Roxb. in Beatson's St Helena Tracts, p. 311 ; Pritchard, Cat. St Hel. PL, p. 19 ; Kuhn, FiL 

 Afr., p. 183. 



St Helena. — Indigenous. On the top of Diana's Peak — Burchell, 198; Hooker; 

 without locality — Seemann ; Morris, in 1883. 



"Plentiful on grassy banks on the high Central Ridge, near Diana's Peak, at 2000 to 

 2700 feet,"— Mdliss. 



Common and generally diffused in the tropics, and extending into the south temperate 

 regions to New Zealand ; it also occurs in some of the other remote islets, as Ascension 

 and St Paul. 



FILIOES. 



POLYPODIACE.E. 



Dicksonia arborescens, L'Herit. 



Dicksonia arborescens, L'Herit., Sert. Angl., p. 31 ; Hook., Sp. FiL, i. p. 66, t. 22, A. ; Hook, and 

 Bak., Synop. Fil. p. 50; Roxb. in Beatson's St Helena Tracts, p. 306; Kuhn, Fil. Afr., p. 160; 

 Melliss, St Hel., p. 553, t. 54. 



Balantium arborescens, Hook., Gen. FiL, t. 20. 



Balantium auricomam, Kaulf., Enum. FiL, p. 228, t. 21, fig. 12. 



Dicksonia Integra, Swartz, Synop. FiL, p. 136. 



St Helena. — Endemic. Diana's Peak and High Peak — Burchell, 193, 194; Hooker; 

 Cuming; Seemann; and many other travellers, including Morris, in 1883. 



The only tree-fern of the island. It grows on the Central Ridge at Diana's and High 

 Peaks at an altitude of 2400 feet up to the summits. Burchell describes the trunk as 

 from twelve to twenty feet high ; and Roxburgh says " general height, when full grown, 

 twenty or more feet, and of various thicknesses up to that of a man's body, with fronds 

 from four to ten feet long." In 1840, Sir Joseph Hooker found very few stems above three 

 feet high, and the tallest was only eleven feet, while most of the plants were very stunted, 

 the stems scarcely appearing above the surrounding herbage. Melliss gives the dimensions 

 as four to ten feet, with a diameter of six to eight inches. 



Hymenophyllum capillaceum, Roxb. 



IlijiiiruiiphijUura capillaceum, Roxb. in Beatson's St Helena Tracts, p. 311 ; Hook., Sp. FiL, i. p. 109, 

 t. 38, B. ; Hook, and Bak., Synop. FiL, p. 58 ; Melliss, St. Hel., p. 354 ; Kuhn, Fil. Afr., p. 38. 



HymenqphyUum infortunatum, Bory in Duperr. Voy. "Coquille," Bot. Crypt, p. 284, i 38, fig, 3; 

 Hook, f., Fl. Antarctica, p. 104. 



HymenqphyUum capiUare, Pritchard, Cat. St. Hel. PL, p. 18. 



Xpltirmciuuiiim infortunatum, Presl, Hymen., p. 35. 



St Helena. — Endemic. On the trunks of the tree-fern and other trees, on the summit 



