Thought I'd post these images of the cut ends of felled pine in Wykeham Forest taken on 24 November. The trees were felled last winter. The fungus is young Stereum sanguinolentum, a white rot, which is common on conifer brash but can also infect living conifers through wounds. Not a favourite fungus of foresters! It shows how the heartwood is much more resistant to fungal attack than the sapwood. It also shows that the fungus spreads radially far quicker than around the annual rings. Although the colonies are of the same species, each will remain distinct, and where each one meets its neighbours there will be a battle and boundary lines marked out!