Why dark wood is at the heart of a tree trunk

Walter Reeves answers Atlanta-area lawn and garden questions, including why many tree trunks have a dark core in the middle, and what to use in a butterfly puddle.

Tree Trunk Rib Heart Cut - Free photo on Pixabay - Pixabay

Open Cavity Exposes Tree Defect - Canopy Tree Service

Close-up of the sawn end of the branch of an unidentified tree, showing the heart wood (dark, centre), sap wood (light) and bark (rusty brown). Sap wo Stock Photo - Alamy

Heart rot - Wikipedia

How to identify a tree by its bark - Discover Wildlife

Is this walnut tree healthy or not? (Is the dark spot inside heartwood, or something else?) : r/wood

Gravity Engineers Academy - Gravity Nutshells PITH/ MEDULLA – Innermost central portion or core of a tree. Size varies from 1.5 – 10 mm HEART WOOD – Inner annular rings surrounding the

Armillaria root rot

Tree rings in Black Alder stock image. Image of tree - 16891757

Tree trunk with sawn-off branch - Stock Image - B720/0037 - Science Photo Library