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The vegetation of the Outer Hebrides
Published online by Cambridge University Press: 05 December 2011
Synopsis
The paper reviews four topics in relation to the vegetation of the Outer Hebrides: (a)history and flora, (b) environment and habitat, (c) geographical relationship, and (d) conservation. The preliminary flora edited by J. W. Heslop Harrison in 1941 remains the best published list, and there is need for a modern flora. A provisional checklist is presented, based upon recently published data, especially the Atlas of the Bristish Flora (Perring and Walters 1962) and the Critical Supplement (Perring 1968) Miss M. S. Campbell has been responsible for a great deal of recent recording. Geology and climate are critical factors, and soils are mainly peat, except in the extensive machair areas. Significant habitals are coastland, wetland, peatland, moorland and upland. woodland is scarce, though there are good amenity woodlands. Each habitat is reviewed in relation to the floristic lists in the Nature Conservation Review (Ratcliffe 1977b). There has been no phytosociological study of the vegetation overall, though particular localities such as St Kilda have been described. The geographical elements are listed, and related to those of Skye, Shetland and Faeroe. The flora is more restricted than that of the mainland. Important categories recognized are (a) species of localized distribution, (b) southern species reaching their northern limits and (c) ‘Atlantic’ species. The origin of the flora is discussed, and it is concluded that the facts have not yet been clearly demonstrated. Eight potential threats are identified as fire, changing agricultural practice including drainage, large-scale peat, sand and gravel extraction, the oil industry, wave-energy generation and tourism.
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References
Adam, P., Birks, H. J. B. and Huntley, B., 1977. Plant communities of the Island of Arran, Scotland. New Phytol., 79, 689–712.Google Scholar
Atkinson, R., 1940. Notes on the botany of North Rona and Sula Sgeir. Trans. Bot. Soc. Edinb., 33, 52–60.CrossRefGoogle Scholar
Atkinson, R. and Roberts, B., 1952. Notes on the Islet of Gasker. Scott. Nat., 64, 129–137.Google Scholar
Balfour, J. H. and Babington, C. C., 1844. Account of a botanical excursion to Skye and the Outer Hebrides during the month of August 1841 and a catalogue of the plants gathered in the islands of North Uist, Harris and Lewis, during the month of August 1941. Trans. Bot. Soc. Edinb., 1, 133–154.Google Scholar
Barrington, R. M., 1885. In ‘Further notes on North Rona’ by J. A. Harvie-Brown. Proc. Roy. Phys. Soc. Edinb., 9, 289.Google Scholar
Bennett, A., 1887 et seq. Additional records of plants from Scotland (additional to Topographical Botany Ed. 2, 1883). Scott. Nat. 1887–1891. Ann. Scot. Nat. Hist., 1892–1899.Google Scholar
Bennett, A., 1892 et seq. Contributions towards a flora of the Outer Hebrides. Ann. Scot. Nat. Hist., 1892–1910.Google Scholar
Bennett, A., 1905. Supplement to Topographical Botany Ed. 2. J. Bot., Lond., 48, Suppl.Google Scholar
Bennett, A., 1909. Plants of the Faroe Isles not occurring in Great Britain, and others not occurring in Shetland, Orkney, Caithness or the Outer Hebrides. Ann. Scot. Nat. Hist., 18, 36–40.Google Scholar
Bennett, A., Salmon, C. E. and Matthews, J. R., 1929–1930. Second supplement to Topographical Botany Ed. 2. J. Bot., Lond., 62 & 63, Suppl.Google Scholar
Berry, R. J., 1979. The Outer Hebrides: where genes and geography meet. Proc. Roy. Soc. Edinb., 77B, 21–43.Google Scholar
Beveridge, E., 1911. North Uist: Its Archaeology and Topography, with Notes upon the Early History of the Outer Hebrides. Edinburgh: Brown.Google Scholar
Beveridge, G., 1926. The submerged forest and peat off Vallay, North Uist. Scott. Nat., 157, 24–25.Google Scholar
Birks, H. J. B., 1973. Past and Present Vegetation of the Isle of Skye; a Palaeoecological Study. Cambridge Univ. Press.Google Scholar
Birks, H. J. B., 1977. The Flandrian Forest history of Scotland: a preliminary synthesis. In: British Quaternary Studies: Recent Advances. Shotton, F. W., Ed., pp. 119–135. Oxford: Clarendon Press.Google Scholar
Birse, E. L., 1974. Bioclimatic characteristics of Shetland. In: The Natural Environment of Shetland. Goodier, R., Ed., pp. 24–32. Edinburgh: Nature Conservancy Council.Google Scholar
Birse, E. L., 1976. The bioclimate of Scotland in relation to a world system of classification and to land use capability. Trans. Bot. Soc. Edinb., 42, 463–467.Google Scholar
Blackburn, K. B., 1946. On a peat from the island of Barra, Outer Hebrides, data for the study of post-glacial history, X. New Phytol., 45, 44–49.Google Scholar
Brewster, D., Hearn, K. A. and Jarman, R. A., 1975. A Survey of the Vegetation of North-west Sutherland. London: Univ. College.Google Scholar
Brook, A. J., 1964. The phytoplankton of the Scottish freshwater lochs. In: The Vegetation of Scotland. Burnett, J. H., Ed., pp. 290–305. Edinburgh: Oliver and Boyd.Google Scholar
Bullard, E. R., 1975. Orkney habitats: an outline ecological framework. In: The Natural Environment of Orkney. Goodier, R., Ed., pp. 19–27. Edinburgh: Nature Conservancy Council.Google Scholar
Bullard, E. R. and Goode, D. A., 1975. The vegetation of Orkney. In: The Natural Environment of Orkney. Goodier, R., Ed., pp. 31–46. Edinburgh: Nature Conservancy Council.Google Scholar
Campbell, M. S., 1937. Three weeks botanizing in the Outer Hebrides. Rep. Bot. Exch. Club, 1936, 304–318.Google Scholar
Campbell, M. S., 1938. Further botanizing in the Outer Hebrides. Rep. Bot. Exch. Club, 1937, 534–560.Google Scholar
Campbell, M. S., 1941. A visit to Scalpay (Harris), V.-C. 110. Rep. Bot. Exch. Club. 1940, 543–545.Google Scholar
Campbell, M. S. (Ed.), 1961. August 1st to 15th, 1959. Isles of Lewis and Harris. (Lewis 1st to 7th August, Miss U. K. Duncan). (Harris 8th to 15th August, Dr F. H. Perring). Proc. Bot. Soc. Brit. Isl., 4, 206–208.Google Scholar
Campbell, M. S., Warburg, E. F. and Wilmott, A. J., 1947. Allt Volagir, South Uist, V.-C. 110. Nature Conservancy Council (typescript, 2 pp.).Google Scholar
Campbell, R. N., 1977. Machair Lochs. In: Sand Dune Machair 2. Ranwell, D. S., Ed., pp. 9–10. Institute of Terrestrial Ecology (NERC).Google Scholar
Clapham, A. R., Tutin, T. G. and Warburg, E. F., 1962. Flora of the British Isles, 2nd edn. Cambridge Univ. Press.Google Scholar
Clark, W. A. 1956. Plant distribution in the Western Isles. Proc. Linn. Soc. Lond., 167, 96–103.CrossRefGoogle Scholar
Copping, A., 1977. Stornoway, Outer Hebrides, 2nd–19th August, 1975. Watsonia, 11, 278–297.Google Scholar
Crampton, C. B., 1911. The Vegetation of Caithness Considered in Relation to the Geology. Cambridge: Committee for the Survey and Study of British Vegetation.Google Scholar
Currie, A., 1977. Butterbur (Petasites hybridus) as an invading species on machair in North-west Lewis. In: Sand Dune Machair 2. Ranwell, D. S., Ed., pp. 22–23. Institute of Terrestrial Ecology (NERC).Google Scholar
Dandy, J. E., 1958. List of British Vascular Plants. London: Brit. Mus. (Nat. Hist.) and BSBI.Google Scholar
Dandy, J. E., 1969. Nomenclatural changes in the list of British vascular plants. Watsonia, 7, 157–178.Google Scholar
Darling, F. F., 1947. Natural History in the Highlands and Islands. New Naturalist Library, 6. London: Collins.Google Scholar
Darling, F. F. and Boyd, J. M., 1964. The Highlands and Islands, 2nd edn. New Naturalist Library, 6. London: Collins.Google Scholar
Dickinson, G., 1968. The Vegetation of Grogary Machair, South Uist. Unpublished report for the Nature Conservancy (Scotland).Google Scholar
Dickinson, G., 1973. Vegetation studies at Luskentyre Banks, South Harris. MS Report. Dept of Geography, Glasgow Univ.Google Scholar
Dickinson, G., Mitchell, J. and Tivy, J., 1971. The application of phytosociological techniques to the geographical study of vegetation (South Uist machair). Scott. Geogr. Mag., 87, 83–102.Google Scholar
Dickinson, G. and Randall, R. E., 1979. An interpretation of machair vegetation. Proc. Roy. Soc. Edinb., 77B, 267–278.Google Scholar
Dunn, M. D., 1937. Notes on the flora of Loch Harray and Loch Stenness and a comparison with the brackish-water lochs of North Uist. Trans. Bot. Soc. Edinb., 32, 368–372.Google Scholar
Elton, C., 1938. Notes on the ecological and natural history of Pabbay and other islands in the Sound of Harris. J. Ecol., 26, 275–297.Google Scholar
Erdtman, G., 1924. Studies in the micropaleontology of post-glacial deposits in Northern Scotland and the Scotch Isles, with especial reference to the history of woodlands. J. Linn. Soc. Bot., 46, 449–504.Google Scholar
Erdtman, G., 1932. The north-western limit of Fagus sylvatica L. Svensk Bot. Tidskr., 26, 201–204.Google Scholar
Ewing, P., 1887–1895. A contribution to the topographical botany of the west of Scotland. Proc. Trans. Nat. Hist. Soc. Glasg., 2, 309–321; 3, 159–165; 4, 199–214.Google Scholar
Ewing, P., 1892; 1899. The Glasgow Catalogue of Native and Established Plants; Being a Contribution to the Topographical Botany of the Western and Central Counties of Scotland, 1st and 2nd edns. Glasgow: Ewing.Google Scholar
Fletcher, H. R., 1959. Exploration of the Scottish flora. Trans. Bot. Soc. Edinb., 38, 30–47.Google Scholar
Forrest, J. E., Waterston, A. R. and Watson, E. V., 1936. The natural history of Barra, Outer Hebrides. Proc. Roy. Phys. Soc. Edinb., 22, 241–296.Google Scholar
Geddes, A., 1936. Lewis. Scott. Geogr. Mag., 52; Vegetation, 224–226. Plant Communities, 226–231. Map by M. Hardy and A. Geddes.Google Scholar
Geikie, J., 1894. The Great Ice Age and its Relation to the Antiquity of Man. London: Stanford.Google Scholar
Gemmell, A. R., Greig-Smith, P. and Gimingham, C. H., 1953. A note on the behaviour of Ammophila arenaria (L.) Link, in relation to sand dune formation. Trans. Bot. Soc. Edinb., 36, 132–136.Google Scholar
Geological Survey, 1957. Geological Map of Great Britain, Sheet 1, 2nd edn. Chessington, Surrey: Ordnance Survey.Google Scholar
Gibson, A. H., 1891. Phanerogamic flora of St Kilda. Trans. Bot. Soc. Edinb., 19, 155.Google Scholar
Gilbert, O. L., Holligan, P. M. and Holligan, M. S., 1973. The flora of North Rona, 1972. Trans. Bot. Soc. Edinb., 42, 43–68.Google Scholar
Gilbert, O. L. and Wathern, P., 1976. The flora of the Flannan Isles. Trans. Bot. Soc. Edinb., 42, 487–503.Google Scholar
Gimingham, C. H., 1948. The role of Barbula fallax Hedw. and Bryum pendulum Schp. in sand dune fixation. Trans. Br. Bryol. Soc., 1, 70–72.CrossRefGoogle Scholar
Gimingham, C. H., 1964a. Maritime and sub-maritime communities. In: The Vegetation of Scotland, Burnett, J. H., Ed., 67–142. Edinburgh: Oliver and Boyd.Google Scholar
Gimingham, C. H., 1964b. Dwarf shrub heaths. In: The Vegetation of Scotland. Burnett, J. H., Ed., pp. 232–289. Edinburgh: Oliver and Boyd.Google Scholar
Gimingham, C. H., 1974. Plant communities of the machair and floristic relationships with non-dune vegetation. In: Sand Dune Machair. Ranwell, D. S., Ed., pp. 13–14. Institute of Terrestrial Ecology (NERC).Google Scholar
Gimingham, C. H., Gemmell, A. R. and Greig-Smith, P., 1949. The vegetation of a sand dune system in the Outer Hebrides. Trans. Bot. Soc. Edinb., 35, 82–96.Google Scholar
Gladstone, J., 1928. Notes on the flora. In ‘St. Kilda’, by J. Mathieson. Scott. Geogr. Mag., 44, 87–89.Google Scholar
Glentworth, R., 1979. Observations on the soils of the Outer Hebrides. Proc. Roy. Soc. Edinb., 77B, 123–137.Google Scholar
Goldsmith, F. B., 1974. The Sea-cliff Vegetation of Shetland. Discussion Papers in Conservation, 9. London: Univ. College.Google Scholar
Goode, D. A., 1972. Criteria for selection of peatland nature reserves in Britain. Proc. 4th Int. Peat Congr. I–IV, Helsinki, pp. 167–177.Google Scholar
Goode, D. A., 1974. The flora and vegetation of Shetland. In The Natural Environment of Shetland. Goodier, R., Ed., pp. 50–72. Edinburgh: Nature Conservancy Council.Google Scholar
Goode, D. A. and Lindsay, R. A., 1979. The peatland vegetation of Lewis. Proc. Roy. Soc. Edinb., 77B, 279–293.Google Scholar
Green, F. W. H., 1964. The climate of Scotland. In: The Vegetation of Scotland, Burnett, J. H., Ed., pp. 15–35. Edinburgh: Oliver and Boyd.Google Scholar
Greig-Smith, P., Gemmell, A. R. and Gimingham, C. H., 1947. Tussock formation in Ammophila arenaria (L.) Link. New Phytol., 41, 262–268.Google Scholar
Gwynne, D., Milner, C. and Hornung, M., 1974. The vegetation and soils of Hirta. In: Island Survivors. Jewell, P. A., Milner, C. and Boyd, J. M., Ed. London: Athlone Press.Google Scholar
Heron, R., 1794. General View of the Natural Circumstances of those Isles which are Distinguished by the Common Name of Hibudae or Hebrides. Edinburgh.Google Scholar
Heslop, Harrison J., 1948. Recent researches on the flora and fauna of the Western Isles of Scotland and their biogeographical significance. Proc. Belf. Nat. Hist. Phil. Soc., 3, 87–96.Google Scholar
Heslop, Harrison J., 1953. The North American and Lusitanian elements in the flora of the British Isles. In: The Changing Flora of Great Britain. Lousley, J. E., Ed., pp. 105–123. BSBI, Arbroath: Buncle.Google Scholar
Heslop, Harrison J. W. 1939a. The Hebridean form of the spotted orchid, Orchis fuchsii Druce. Vasculum, 25, 109–112.Google Scholar
Heslop, Harrison J. W., 1939b. Fauna and flora of the Inner and Outer Hebrides; King's College (Univ. of Durham) biological expeditions. Nature, Lond., 143, 1004–1007.Google Scholar
Heslop, Harrison J. W., 1941a. A preliminary flora of the Outer Hebrides. Proc. Univ. Durham Phil. Soc., 10, 228–273.Google Scholar
Heslop, Harrison J. W., 1941b. Flora and fauna of the Inner and Outer Hebrides. Nature, Lond., 147, 134–136.Google Scholar
Heslop, Harrison J. W., 1948. The passing of the Ice-age and its effect upon the plant and animal life of the Scottish Western Isles. New Nat., 2, 83–90.Google Scholar
Heslop, Harrison J. W., 1950. A dozen years' biogeographical researches in the Inner and Outer Hebrides. Proc. Univ. Durham Phil. Soc., 10, 516–524.Google Scholar
Heslop, Harrison J. W., 1951. Vascular plants in the Outer Hebrides in 1950. Proc. Univ. Durham Phil. Soc., 11, 1–11.Google Scholar
Heslop, Harrison J. W., 1953. Observations on the flora of the Isle of Lewis, Isle of Harris and the Shiant Isles in 1952. Proc. Univ. Durham Phil. Soc., 11, 83–90.Google Scholar
Heslop, Harrison J. W., 1956. Botanizing in the Outer Hebrides in 1955 and 1956. Proc. Univ. Durham Phil. Soc., 12, 141–149.Google Scholar
Heslop, Harrison Y., 1955. Nymphaea L. (Biol. Flora of Brit. Is.). J. Ecol., 43, 719–734.Google Scholar
Hulten, E., 1950. Atlas of the Distribution of Vascular Plants in North-west Europe. Stockholm.Google Scholar
Ing, B., 1968. Myxomycetes from Scottish Islands. Trans. Bot. Soc. Edinb., 40, 395–415.Google Scholar
Jermy, C. and Crabbe, J. A., 1978. The Island of Mull. A Survey of the Environment and Vegetation. London: Brit. Mus. (Nat. Hist.)Google Scholar
Jewell, P. A., Milner, C. and Boyd, J. M., 1974. Island Survivors: the Ecology of the Soay Sheep of St Kilda. (Vegetation Map, NCC, 1971.) London: The Athlone Press.Google Scholar
Johnston, J. L., 1974. Shetland habitats, an ecological framework. In: The Natural Environment of Shetland. Goodier, R., Ed., pp. 33–49. Edinburgh: Nature Conservancy Council.Google Scholar
Knox, A. J., 1974. Agricultural use of machair (summary). In: Sand Dune Machair. Ranwell, D. S., Ed., p. 19. Institute of Terrestrial Ecology (NERC).Google Scholar
Lind, E. M., 1952. The phytoplankton of some lochs in South Uist and Rhum. Trans. Bot. Soc. Edinb., 36, 37–41.Google Scholar
Macculloch, J., 1819; 1824. The Highlands and Western Isles of Scotland; Founded on a Series of Annual Journies between 1811 & 1821. London: Longman.Google Scholar
Macgillivray, J., 1842. Account of the island of St Kilda, chiefly with reference to its natural history; from notes made during a visit in July 1840. Edinb. Phil. J., 32, 47 and 178.Google Scholar
Macgillivray, W., 1830. Account of the series of islands usually denominated the Outer Hebrides. Edinb. J. Nat. Geogr. Sci., 1, 245–250, 401–411 and 2, 87–95, 160–165, 321–334.Google Scholar
Macleod, A. M., 1949. Some aspects of the plant ecology of the Island of Barra. Trans. Bot. Soc. Edinb., 35, 67–81.Google Scholar
Mcvean, D. N., 1958. Island vegetation of some West Highland freshwater lochs. Trans. Bot. Soc. Edinb., 37, 200–208.Google Scholar
Mcvean, D. N., 1961. Flora and vegetation of the islands of St Kilda and North Rona in 1958. J. Ecol., 49, 39–54.Google Scholar
Mcvean, D. N., 1964. (Montane zone) dwarf shrub heaths, grass heaths, herb and fern meadows, moss heaths. In: The Vegetation of Scotland. Burnett, J. H., Ed., pp. 481–535. Edinburgh: Oliver and Boyd.Google Scholar
Mcvean, D. N. and Ratcliffe, D. A., 1962. Plant Communities of the Scottish Highlands. Monographs of the Nature Conservancy, 1. London: HMSO.Google Scholar
Malloch, A. J. C., 1972. An Outline of the Literature on the Vegetation of Sea-cliffs. Rep. of the Sea-cliff Vegetation Study Group, Appendix (D), Nature Conservancy (NERC).Google Scholar
Manley, G., 1952. Climate and the British Scene. New Naturalist Library, 22. London: Collins.Google Scholar
Manley, G., 1979. The climatic environment of the Outer Hebrides. Proc. Roy. Soc. Edinb., 77B, 47–59.Google Scholar
Martin, M., 1698. A Late Voyage to St Kilda, the Remotest of all the Hebrides. London.Google Scholar
Mather, A. S. and Ritchie, W., 1971. Beaches of Lewis and Harris. Dept. of Geography, Univ. of Aberdeen.Google Scholar
Mather, A. S. and Ritchie, W., 1977. The Beaches of the Highlands and Islands of Scotland. Countryside Commission for Scotland.Google Scholar
Matthews, J. R., 1937. Geographical relationships of the British flora. J. Ecol., 25, 1–90.Google Scholar
Matthews, J. R., 1955. Origin and Distribution of the British Flora. London: Hutchinson's Univ. Library.Google Scholar
Melderis, A., 1953. Some parallels between the British and Scandinavian mountain floras. In: The Changing Flora of Great Britain. Lousley, J. E., Ed., pp. 89–104. BSBI, Arbroath: Buncle.Google Scholar
Muirburn Working Party, 1977. A Guide to good Muirburn Practice. DAFS and NCC. Edinburgh: HMSO.Google Scholar
Murray, J. and Pullar, L., 1910. Bathymetrical Survey of Scottish Freshwater Lochs, 1–4. Edinburgh.Google Scholar
Nature Conservancy Council, 1977. Outer Hebrides. Localities of Geological and Geomorphological Importance. Newbury, Berks.: Geology and Physiography Section, Nature Conservancy Council.Google Scholar
Nicol, E. A. T., 1936. The brackish-water lochs of North Uist. Proc. Roy. Soc. Edinb., 56, 169–195.CrossRefGoogle Scholar
Niven, W. N., 1902. On the distribution of certain forest trees in Scotland, as shown by the investigation of post-glacial deposits. Scott. Geogr. Mag., 18, 24–29.Google Scholar
Ostenfeld, C. H., 1909. The floras of the Faröes and Iceland compared with that of Scotland. Ann. Scot. Nat. Hist., 18, 186–187.Google Scholar
Pearsall, W. H., 1968. Mountains and Moorlands, 2nd edn. New Naturalist Library, 11. London: Collins.Google Scholar
Perring, F. H., 1953. A 17th-century contribution to the Scottish flora. Watsonia, 3, 36–40.Google Scholar
Perring, F. H. (Ed.), 1968. Critical Supplement to the Atlas of the British Flora. For BSBI. London: Nelson.Google Scholar
Perring, F. H. and Randall, R. E., 1972. An annotated flora of the Monach Isles NNR, Outer Hebrides. Trans. Bot. Soc. Edinb., 41, 431–444.Google Scholar
Perring, F. H. and Walters, S. M., (Eds), 1962. Atlas of the British Flora. For BSBI. London: Nelson.Google Scholar
Perring, F. H. 1976. Atlas of the British Flora, 2nd edn. For BSBI. EP Publishing, England.Google Scholar
Poore, M. E. D. and Robertson, V. C., 1949. The vegetation of St Kilda in 1948. J. Ecol., 37, 82–99.CrossRefGoogle Scholar
Randall, R. E., 1973. Calcium carbonate in dune soils: evidence for geomorphic change. Area, 5, 308–310.Google Scholar
Randall, R. E., 1974a. Airborne salt deposition and its effect upon coastal plant distribution: the Monach Isles NNR, Outer Hebrides. Trans. Bot. Soc. Edinb., 42, 153–162.Google Scholar
Randall, R. E., 1974b. Aspects of machair ecology on the Monach Isles (summary). In: Sand Dune Machair. Ranwell, D. S., Ed., pp. 15–18. Institute of Terrestrial Ecology (NERC).Google Scholar
Randall, R. E., 1976. Machair zonation of the Monach Isles NNR, Outer Hebrides. Trans. Bot. Soc. Edinb., 42, 441–462.Google Scholar
Randall, R. E., 1977. Pollen catchment in relation to local vegetation: Ceann Ear, Monach Isles NNR, Outer Hebrides (summary). In: Sand Dune Machair 2. Ranwell, D. S., Ed., pp. 16–22. Institute of Terrestrial Ecology (NERC).Google Scholar
Ranwell, D. S., 1972. Ecology of Salt Marshes and Sand Dunes. London: Chapman and Hall.Google Scholar
Ranwell, D. S., 1974. Machair in relation to the British sand dune series (summary). In: Sand Dune Machair. Ranwell, D. S., Ed., pp. 4–5. Institute of Terrestrial Ecology (NERC).Google Scholar
Ranwell, D. S., 1977. Extensive survey of dune vegetation in Scotland (summary). In: Sand Dune Machair 2. Ranwell, D. S., Ed., pp. 12–13. Institute of Terrestrial Ecology (NERC).Google Scholar
Ratcliffe, D. A., 1959. Vegetation of Boreray, Soay, Dun and Stac an Armin. In Mcvean, 1961, 46–47.Google Scholar
Ratcliffe, D. A., 1964. Mires and bogs. Montane mires and bogs. In: The Vegetation of Scotland. Burnett, J. H., Ed., pp. 426–478, 536–558. Edinburgh: Oliver and Boyd.Google Scholar
Ratcliffe, D. A., 1968. An ecological account of Atlantic bryophytes in the British Isles. New Phytol., 67, 365–439.Google Scholar
Raven, J. and Walters, M., 1956. Mountain Flowers. New Naturalist Library, 33. London: Collins.Google Scholar
Riedl, H., 1979. Phytogeographical and ecological relations of epiphytic lichens from Lewis and Harris with notes on other cryptogamic epiphytes. Proc. Roy. Soc. Edinb., 77B, 295–304.Google Scholar
Ritchie, W., 1966. The post-glacial rise in sea-level and coastal changes in the Uists. Inst. Br. Geogr. Trans. & Papers, 1966, Publ. 39.Google Scholar
Ritchie, W., 1971. Beaches of Barra and the Uists. Dept of Geography, Univ. of Aberdeen.Google Scholar
Ritchie, W., 1976. The meaning and definition of machair. Trans. Bot. Soc. Edinb., 42, 431–440.Google Scholar
Ritchie, W., 1979. Machair development and chronology in the Uists and adjacent islands. Proc, Roy. Soc. Edinb., 77B, 107–122.Google Scholar
Roberts, B. and Atkinson, R., 1955. The Haskeir Rocks, North Uist. Scott. Nat., 67, 9–18.Google Scholar
Roberts, H. W., Kerr, D. H. and Seaton, D., 1959. The machair grasslands of the Hebrides. J. Br. Grassld Soc., 14, 223–228.Google Scholar
Scott, T., 1895. The Sea Spleenwort in the Island of Barra. Ann. Scot. Nat. Hist., 4, 64.Google Scholar
Seaton, D., 1968. Bornish blow-out. A record of cooperation in overcoming machair land erosion. Scot. Agric., Summer 1968, 145–148.Google Scholar
Shoolbred, W. A., 1895. Plants observed in the Outer Hebrides in 1894. J. Bot. Lond., 33, 247–249.Google Scholar
Simpson, N. D., 1960. A Bibliographical Index of the British Flora. Privately Printed.Google Scholar
Smith, D. I. and Fettes, D. J., 1979. The geological framework of the Outer Hebrides. Proc. Roy. Soc. Edinb., 77B, 75–83.Google Scholar
Somerville, A., 1889. Notes on the flora of the Island of Barra. Proc. Trans. Nat. Hist. Soc. Glasg., 2, 183–188.Google Scholar
Somerville, A., 1889. Notes on the flora of Barra and South Uist. Proc. Trans. Nat. Hist. Soc. Glasg., 3, 31–36.Google Scholar
Somerville, A., 1891. Plants exhibited (1890) from Mingulay. Proc. Trans. Nat. Hist. Soc. Glasg., 3, 47.Google Scholar
Spence, D. H. N., 1957. Studies on the vegetation of Shetland. I. The serpentine debris vegetation in Unst. J. Ecol., 45, 917–945.Google Scholar
Spence, D. H. N., 1959. Studies on the vegetation of Shetland. II. Reasons for the restriction on the exclusive pioneers to serpentine debris. J. Ecol., 47, 641–649.Google Scholar
Spence, D. H. N., 1960. Studies on the vegetation of Shetland. III. Scrub in Shetland and in South Uist, Outer Hebrides. J. Ecol., 48, 73–95.Google Scholar
Spence, D. H. N., 1974. Subarctic debris and scrub vegetation of Shetland. In: The Natural Environment of Shetland. Goodier, R., Ed., pp. 73–88. Edinburgh: Nature Conservancy Council.Google Scholar
Spence, D. H. N., Allen, E. D. and Fraser, J., 1979. Macrophytic vegetation of fresh and brackish waters in and near the Loch Druidibeg National Nature Reserve, South Uist. Proc. Roy. Soc. Edinb., 77B, 307–328.Google Scholar
Stace, C. A., Ed., 1975. Hybridization and the Flora of the British Isles. For BSBI. London: Academic Press.Google Scholar
Steven, H. M. and Carlisle, A., 1959. The Native Pinewoods of Scotland. Edinburgh: Oliver and Boyd.Google Scholar
Summerhayes, V. S., 1968. Wild Orchids of Britain. New Naturalist Library, 19. London: Collins.Google Scholar
Sutherland, J. P., 1973. Shelter Belts in the Outer Hebrides. North of Scotland College of Agriculture.Google Scholar
Tansley, A. G., 1939; 1953. The British Islands and their Vegetation. Cambridge Univ. Press. (Revised reprint 1953.)Google Scholar
Trail, J. W. H., 1898–1909. Topographical botany of Scotland, (followed by ‘additions and corrections to the topographical botany of Scotland’) Ann. Scot. Nat. Hist., 1898–1900, 1905–1909.Google Scholar
Trail, J. W. H., 1905. The plants of the Flannan Islands. Ann. Scot. Nat. Hist., 14, 187.Google Scholar
University of Glasgow, 1967. Loch à Mhachair. Topographic and Reconnaissance Vegetation Map. Dept of Geography.Google Scholar
Von, Weymarn J., 1979. A new concept of glaciation in Lewis and Harris, Outer Hebrides. Proc. Roy. Soc. Edinb., 77B, 97–105.Google Scholar
Watson, E. V., 1939. Notes on the flora of Barra, Outer Hebrides. J. Bot. Lond., 77, 5–8.Google Scholar
Watson, E. V. and Barlow, H. W. B., 1936. The vegetation. In ‘The Natural History of Barra, Outer Hebrides’, Eds Forrest, J. E., Waterston, A. R. & Watson, E. V.. Proc. Roy. Phys. Soc. Edinb., 22, 244–254.Google Scholar
Wilmott, A. J., 1945. III. Vegetation of Uig. In: The Flora of Uig. Campbell, M. S., Ed., pp. 20–43. Arbroath: Buncle.Google Scholar
Wilson, R. W., 1972. The flora of Clastal Cliffs in the British Isles. Countryside, spring 1972.Google Scholar