This morning I cut a stem from one of my suffering Elders that was not fully dead yet.I brought it inside and looked at it under my bench top magnifier.I split the stem open and looked at the pith and any signs of borers. The telltale black staining was at the bottom so I carefully peeled back the bark ,moving up the stem. The bark is very thin although this stem is only about 1 inch in diameter. I could clearly see where black staining turns to green....maybe 8 inches up. I chose this stem because it wasn't fully dead yet so I could see this. The leaves had fallen but the stem was mostly still green/living. Maybe this is Honey Fungus. I read that one in Oregon state is considered the largest living organism on the plant! Yikes! I'm going to cut some larger stem and dissect those as well.