Summary
Most forest fungi have a great altitudinal range, being found from sea level to the extreme limits of the timbered zones.
Most of the common forest fungi are found at the highest timbered zones but are not so abundant as at lower elevations.
Certain of the more economic species predominate in particular forest zones or types.
Some species are strictly alpine in habit and are not found below certain elevations and exhibit particular adaptation to their environment.
With increasing elevation the sporophores of certain fungi predominating in lower forest zones exhibit many changes in form, structure, and in mode and place of attachment. The great variation in the temperature and moisture relation induced by the diversity of high mountain regions may greatly influence the development of the aerial parts of wood-destroying fungi but may not materially influence their development within the substratum.
The influence of high mountain conditions on the form and structure of host plants in turn influence the growth of their fungous parasites.