How tall can a tree grow and what happens when life follows it upward?
In Tasmania, the Swamp Gum (Eucalyptus regnans) reaches more than 300 feet, rivaling redwoods. The tallest known specimen, the Centurion, rises 329 feet (100 meters), making it the tallest flowering plant on Earth. Yet its height is only part of the story. High in its canopy, natural hollows collect rainwater, forming suspended pond ecosystems where frogs and insects live in entire communities, thriving above the forest floor.
This striking example, highlighted in Trees, An Illustrated Celebration by Kelsey Oseid, invites a deeper realization – trees are living systems that actively build the world around them. They move water from soil to sky, influence rainfall patterns, regulate temperature through evapotranspiration, and create vertical habitats that sustain life from the microscopic communities in the soil to water-filled hollows high in the canopy. A single mature tree is not just an organism, it is a climate moderator, a hydrological partner, and a layered ecosystem in its own right.
Join us for our upcoming spring course Emergent Intelligence of Trees, hosted by Jim Laurie, where we’ll explore these awe-inspiring traits and mechanisms of trees and the forests they live in. Course starts March 18; Free Introductory Webinar on March 11.
Posted: March 7, 2026