. Annual report of the Agricultural Experiment Station. Cornell University. Agricultural Experiment Station; Agriculture -- New York (State). Shade Tkee and Timber Destkoying Fungi. 239 small amonnt of air in the interior of the tree. When sections of the trunk were cut, and piled togetlier, the mycelium at the cut surfaces grew very rapidly. The mycelium here had access to air, and the moist- ure was conserved by the cut sur- faces being in contact. In this way it was easy to demonstrate the presence of the mycelium in parts of tlio wood which to the eye appeared sound. The mycelium grew out
. Annual report of the Agricultural Experiment Station. Cornell University. Agricultural Experiment Station; Agriculture -- New York (State). Shade Tkee and Timber Destkoying Fungi. 239 small amonnt of air in the interior of the tree. When sections of the trunk were cut, and piled togetlier, the mycelium at the cut surfaces grew very rapidly. The mycelium here had access to air, and the moist- ure was conserved by the cut sur- faces being in contact. In this way it was easy to demonstrate the presence of the mycelium in parts of tlio wood which to the eye appeared sound. The mycelium grew out from the wood into the moist air along the concentric annual rings^ and the medullary rays, so that within 24 hours the location of the mycelium at these points was plainly demonstrated and photographs taken at this time marked tlie location of the mycelium in the infected areas. In several days' time, however, the myce- lium spread out between the cut surface forming thin sheets of " punk.'" POLYPORUS IgNIARIUS. This species occurs on broad leaved trees. It is known on the apple, oak, alder, beech, birch, maple and other species. The fruit. 71.— PolypoTus igniarius, tongue form of fruit body on Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Cornell University. Agricultural Experiment Station. Ithaca, N. Y. : The University
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