Darkly stained wood from a Chinese hackberry tree that died from an unexplained malady. The cross-section at the right is from 1 foot above the ground and the left wood is from 15 feet above the ground.

Dark heartwood stain about near ground and above 10 feet above compared in dying Chinese hackberry infected with Verticillium sp. and undiagnosed malady. UCD by JKC.  Credit: Jack Kelly Clark
Credit: Jack Kelly Clark