DPG pointing out discolored inner bark caused by Port Orford cedar root disease. Near Bandon, Oregon.
Port-Orford-cedar root disease is best identified by the cinnamon-colored inner bark and cambium that abruptly joins creamy white, healthy inner bark in roots and lower boles. Just prior to tree death, the discolored zone may extend 2 to 5 feet aboveground. This symptom is most readily seen on trees that are wilted or yellow. In trees that have been dead for several months, all the inner bark tissues are brown, dry, and often full of galleries made by cedar bark beetles. For more, see: www.fs.usda.gov/detail/r6/forest-grasslandhealth/insects-...
Photo by: DPG Date: August 1965
Credit: USDA Forest Service, Region 6, State and Private Forestry, Forest Health Protection. Source: FHP slide collection; Regional Office, Portland, Oregon.