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Summary
The value of temperature responses of the mycelium as a means of differentiating cultures of wood-destroying fungi is elaborated. A few pairs of closely related fungi are used to illustrate the feasibility of using this reaction.
The temperature test is applied for the purpose of distinguishing Fomes roseus (Alb. & Schw.) Cooke and Trameles subrosea Weir, and also as contributory evidence of their specific difference.
Trameles Feei Fries, the only other polypore in this country with a rose-colored hymenium, was also included in these tests as a matter of interest.
Data are adduced to show that Fomes roseus and Trametes subrosea are different also in their moisture requirements, or dryness tolerances, with regard to fruiting if not to growth. This was shown to be true not only by observation and experiment in the field, but also in wood block cultures in the laboratory.