Annual report of the North Carolina Agricultural Experiment Station . Fig. 36.— Volutellafructi S. and H. Pol-ygon of spores show-ing Volutella fructi S. and H. M= + .5778 + ± The last five polygons are without particularsignificance and serve only to show the variationencountered in these forms. Fig. 37.— Volutella fructi S. andH. Polygon of spores showing1 ength. VARIATION OF FUNGI DUE TO ENVIRONMENT. 71 General Considerations. The bearing of these facts upon mycologieal taxonomy is apparent. If afungus can be easily changed as regards its ess
Annual report of the North Carolina Agricultural Experiment Station . Fig. 36.— Volutellafructi S. and H. Pol-ygon of spores show-ing Volutella fructi S. and H. M= + .5778 + ± The last five polygons are without particularsignificance and serve only to show the variationencountered in these forms. Fig. 37.— Volutella fructi S. andH. Polygon of spores showing1 ength. VARIATION OF FUNGI DUE TO ENVIRONMENT. 71 General Considerations. The bearing of these facts upon mycologieal taxonomy is apparent. If afungus can be easily changed as regards its essential descriptive charactersby a change in substratum, density of infection or other environmental factor,these characters are worthless for descriptive purposes, unless the conditionsunder which they develop be accurately known. There are two fundamental requisites of benefits from description: (1) toenable recognition of a particular form; (2) to aid in classification. The first of these is necessary preliminary to the second, and it is with mererecognition that we have in many instances yet to deal in mycology, particu-larly amo
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