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| - THE PLACE OF A SPECIES IN THE FOREST, WITH SPECIAL REFERENCE TO WESTERN NORTH AMERICAN SPECIES OF CONIFER USED IN BRITAIN
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| - The nature of the differences between the climates of the Queen Charlotte Islands and of England and Wales are discussed briefly. The author then examines the site tolerance of the principal species within their own natural range, comparing particularly the place of Sitka spruce (Picea sitcbensis Carr.) in the forest on Graham Island with its place around Terrace and describing the Douglas fir forests of the drier eastern side of Vancouver Island and the place that Sitka spruce has in them. Factors affecting the growth of Douglas fir (Pseudotsuga taxifolia Brit.) are discussed. It is suggested that care is needed before it is assumed that a markedly dry summer period such as occurs in much of the Douglas fir region entails a ‘dry’ period as regards supply to the tree. Illustrations are given from eastern North America of changes in type of site occupied by a species with change in climatic or edaphic environment. Observation of the relative position of a species in the forest as climate changes makes it possible to suggest the place of Sitka spruce and Douglas fir in Great Britain.
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