THE BOTANY OF GOUGH ISLAND. 41 



ASPLENIUM ALVAREZENSE, Rud. Br., sp. nov. (Plate IV.) 



Horba parva, caudex brevis, paleis paucis sparsis ; stipites 1 ad 5 cm., tenues virides 

 nudi ; frondes oblongo-deltoides bipinnatse subcoriacese ; pinnae superiores ssepe in 

 pinnulas indistincte divisse ; pinnulae cuneatse vel late obovatae, margine exteriore 

 rotundato ; venae pinnularum dichotomy ; sori median! liuearcs. 



This species is very near to Aspknium Ruta-muraria, from which it chiefly differs 

 in having its pinnules always entire. Unfortunately none of the specimens show the 

 sori in very good condition. 



Endemic on Gough Island. It is plentiful on the stems of tree-ferns (Lomaria 

 Boryana), but not common elsewhere. 



POLYPODIUM AQUILINUM, Thou. Esq. Fl. Trist., p. 32 ; Hook, and Baker, Syn. Fil., 

 p. 311 ; P. acunhianum, Carmich. fide, Hemsl. Chall. Sot., i. n. p. 167. 



Nephrodium aquilinum, Hemsl. Chall. Bot., loc. cit., t. 39. 



Common. 



Distribution.. Tristan da Cunha, Nightingale and Inaccessible Islands ; Amsterdam 

 Island (?). 



POLYPODIUM ATJSTRALE, Mett. Polypod., p. 36 ; Hook, and Baker, Syn. Fil., p. 322 ; 

 Hemsl. Chall. Bot., i. n. p. 168. 



Grammitis australis, R. Br. Prodi: Fl. Nov. Holl., p. 146 ; Carmich. in Trans. 

 Linn. Soc. Lond., xii. (1818), p. 510. G. magellanica, Desv. Journ. Bot., iii. (1814), 

 p. 275. 



Only one specimen of this was found. 



Distribution. Tristan da Cunha; Tierra del Fuego, Australia, New Zealand, and 

 Marion Island. 



For the determination of this species I am indebted to Mr C. H. Wright of the 

 Royal Gardens, Kew. 



ASPIDIUM CAPENSE, Willd. Sp. PL, v. p. 267 ; Hook, and Baker, Syn. Fil, p. 254. 

 A. coriaceum, Swartz, Prod. Fl. Ind. Occ., p. 133 ; Hook. Sp. Fil., iv. p. 32 ; Carmich. 

 in Trans. Linn. Soc. Lond., xii. (1818), p. 511 ; Hemsl. Chall. Bot., i. n. p. 167. 



Polypodium calyptratum, Thou. Esq. Fl. Trist., p. 33. 



Fairly common. 



The Gough Island specimens are larger than the Tristan da Cunha ones of 

 Moseley, and in size approximate more to the specimen of De 1'Isle's from Amsterdam 

 Island. 



Distribution. Tristan da Cunha ; America south of Cuba, South Africa, Mascarene 

 Islands, Amsterdam Island, Australia, and Polynesia. 



ACROSTICHUM CONFORMS, Swartz, Syn. Fil., pp. 10 and 192, t, 1, fig. 1 ; Carmich. 

 in Trans. Linn. Soc. Lond., xii. (1818), p. 509 ; Hook, and Baker, Syn. Fil., p. 401 ; 



Hemsl. Chall. Bot., i. n. p. 169. A. laurifolium, Thou. Esq. Fl. Trist., p. 31. 

 VOL. III. 6 



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