When my husband and I went for a hike last Sunday in Scott's Run Nature Preserve, along the banks of the Potomac River in Virginia, we chanced upon a spectacular fungus growing on a fallen log. Photos are attached. As best as I can determine through Google, this is either Laetiporus sulphureus or L. cincinnatus, both of which are edible as long as they are growing on hardwood trees rather than conifers. The growth was at least five feet long.