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Vegetation and checklist of Inaccessible Island, central South Atlantic Ocean, with notes on Nightingale Island
Submitted: 13 October 1992 | Published: 14 October 1992
About the author(s)
J. P. Roux, National Botanical Institute., South AfricaP. G. Ryan, Percy FitzPatnck Institute for African Ornithology, University of Cape Town, South Africa
S. J. Milton, Botany Department, University of Cape Town
C. L. Moloney, Percy FitzPatnck Institute for African Ornithology, University of Cape Town, South Africa
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The physiography and climate of Inaccessible and Nightingale Islands are briefly discussed. The vegetation and the major plant associations are described. Notes are given on the ecology and distribution of each taxon. Taxa newly recorded for Inaccessible Island include Agrostis goughensis, A.holgateana, A. wacei, Calamagrostis deschampsiiformis, Carex thouarsii var. recurvata, Conyza albida, Elaphoglossum campylolepium and Uncinia meridensis. One species, C. albida, is alien to the Tristan group. Two native ferns Asplenium platybasis var. subnudum and Blechnum australe were found on Nightingale Island for the first time, and the presence of introduced Malus domestica orchards was recorded. Two unidentified taxa were found that may represent new species: Elaphoglossum sp. at Inaccessible Island and Apium sp. at both Inaccessible and Nightingale Islands.
The total number of vascular plant species recorded at Inaccessible and Nightingale Islands now stands at 98 and 43, respectively, of which 26 (28%) and seven (16%) are introduced species. Only Airiplex plebeja and two species of Cotula occur at Nightingale Island but are absent from Inaccessible Island.
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