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references

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  • ARMSTRONG, R. A. (1974b). Growth phases in the life of a lichen thallus. New Phytol., 73, 913.
  • ARMSTRONG, R. A. (1975). The influence of aspect on the pattern of seasonal growth in the lichen Parmelia glabratula ssp. fuliginosa (Fr. ex Duby) Laund. New Phytol., 75, 245.
  • BAILEY, R. H. (1976). Ecological aspects of dispersal and establishment in lichens. In: Lichenology: Progress and Problems (Ed. By D. H.Brown, D. L.Hawksworth and R. H.Bailey). Academic Press, London .
  • HARRIS, G. P. (1971a). The ecology of corticolous lichens. I. The zonation on oak and birch in south Devon. J Ecol., 59, 431.
  • HARRIS, G. P. (1971b). The ecology of corticolous lichens. II. The relationship between physiology and the environment. J Ecol., 59, 441.
  • JAMES, P. W. (1965). A new check list of British lichens. Lichenologist, 3, 95.
  • KERSHAW, K. A. (1964). Preliminary observations on the distribution and ecology of epiphytic lichens in Wales. Lichenologist, 2, 263.
  • YARRANTON, G. A. & GREEN, W. G. E. (1966). The distributional pattern of crustose lichens on limestone cliffs at Rattlesnake Point, Ontario. Bryologist, 69, 450.