Giant elm bracket.
Beech, horse chestnut, poplar.
Elderberry, elm, lime, maple, plane, sycamore.
Found at the base of the tree and along the main stem – when found up the stem, it often emerges from pruning wounds or storm-damaged regions where limbs have been lost. Can be found growing within hollows quite routinely.
Perennial. Tough and woody. Begins as a white mass. Develops into a bracket with a beige-white upper surface that routinely becomes algal-stained and mossy. Pore layer off-white. Spore white. Flesh strikingly white. Shallow tube layer cinnamon-orange. Can become very large.
Attributed to a brown rot of the (false) heartwood. Reaction growth therefore not induced (wood retains its rigidity). Potentially weakly pathogenic though research is lacking. When fruiting from a pruning wound or area that has been storm-damaged, decay may be localised. For trees where targets exist, investigations into hollowness may be required. Where decay is suspected to be below-ground, stability investigations may be needed.