An illustrated diagram labeling various parts of a large, old tree trunk, roots, and canopy, detailing features like cavities, fungi, and rotting wood.

CANOPY ┌──────────────────────┐ │ Dead branches (D1) │ │ Exposed sapwood (D2) │ │ Fungal brackets (F1) │ └──────────────────────┘ / | \ / | \ / | \ BRANCH CROTCHES (MOIST ZONE) • Sap runs (S1) • Water pockets (W1) • Bark fissures (B3) • Small cavities (C2) \ | / \|/ TRUNK • Trunk cavities (C1) • Woodpecker holes (C3) • Rot columns (R1) • Loose bark plates (B1) • Annual fungal bodies (F2) || || || BASE OF TRUNK • Basal cavities (C4) • Soil‑contact fungi • Moist bark pockets / \ / \ ROOT SYSTEM • Shallow lateral roots • Buttress roots • Root‑plate cavities (RZ1) • Mycorrhizae at root edge (M1) • Soil invertebrate habitat See more