. Bulletin of the British Museum (Natural History) Botany. VASCULAR PLANTS FROM TRISTAN DA CUNHA 409. "^' â if. â . Fig. 33 Gough Island near the ridge peaks, with the ferns Blechnum palmiforme and Histiopteris incisa var. carmichaeliana and the island tree, Phylica arborea, forming the foreground. 8 June 1927. From an original watercolour by Sir Alister Hardy. (BM), 174 (BM); Dver 3555 (PRE, NBG); Fleming 78 (E); Mejland 157 (O); 1014 (O, K), 1437 (O), 1438 (O, BM), 1439 (O, BM), 1440 (O, BM, K), 1441 (O); Thouars (P -holotype of P. palmaeformis); Wace (BM). Inaccessible: Chris
. Bulletin of the British Museum (Natural History) Botany. VASCULAR PLANTS FROM TRISTAN DA CUNHA 409. "^' â if. â . Fig. 33 Gough Island near the ridge peaks, with the ferns Blechnum palmiforme and Histiopteris incisa var. carmichaeliana and the island tree, Phylica arborea, forming the foreground. 8 June 1927. From an original watercolour by Sir Alister Hardy. (BM), 174 (BM); Dver 3555 (PRE, NBG); Fleming 78 (E); Mejland 157 (O); 1014 (O, K), 1437 (O), 1438 (O, BM), 1439 (O, BM), 1440 (O, BM, K), 1441 (O); Thouars (P -holotype of P. palmaeformis); Wace (BM). Inaccessible: Christophersen 2440 (O, BM), 2455 (O); 2559 (O); Stableford 121 (K). Nightingale: Christophersen 2212 (O, BM, K). Gough: Brown (E): MacKinnon (K); van derMerwe 40 (PRE); Wace 55 (BM), 67 (BM), 153(BM), 154(BM). Blechnum penna-marina (Poiret) Kuhn Acrostichum polytrichoides Thouars (text) ['A. polypodioides' below plate]; Lomaria antarctica Carmich.; L. alpina sensu Hemsley, non () Spreng. Native. First collected on Tristan da Cunha by Aubert Du Petit-Thouars in January 1793. Here it has now become abundant on the steeper slopes, where it often forms a dense pure community; it also occurs up to 650 m in scrub associated with Empetrum rubrum and Phylica arborea. Examples cytologically investigated by Manton & Vida (1968: 372-3) were shown to differ from New Zealand plants of the same species that had long been under cultivation in Leeds University greenhouses. The Tristan material gave 2n=66; that from New Zealand 2n=68. In addition, the morphological differences between the Tristan and South American plants in comparison with those from Australasia indicate separation at subspecific level (A. C. itrmy, pers. comm.) Tristan: Bonomi 26a (NBG), 28 (K); Carmichael (BM -holotype of L. antarctic (E [ex herb. Menzies]); Christophersen 4b (O), 209 (O), 471 (O), 1062 (O); Dickson 13 (BM); Dver 3521 (PRE, K, NBG); Fleming 42 (E), 56 (E), 87 (E); Glass (BM);
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