The Life of Trees
Go beyond basic identification to understand the complex hydraulics, social networks, and structural engineering of the world's oldest living organisms.
Like Duolingo, but for The Life of Trees. Tomo turns the whole topic into a game you play five minutes a day, until it actually sticks.
24 levels across 4 sections, about 48 minutes end to end, roughly 10 days at five minutes a day. It moves through Reading the Tree, The Living System, The Forest Network, and Trees in the Human Landscape. It assumes you already know the basics.
Free forever · No credit card · iPhone & Android

Key ideas in The Life of Trees
- Mature bark develops unique textures like plates, scales, or ridges
- Most North American trees use an alternating zig-zag branching pattern
- Beech trees maintain smooth bark even as they age and grow large
- The MAD horse mnemonic (Maple, Ash, Dogwood) identifies opposite branching
- Cherry bark is distinguished by its dark, flaky, 'burnt' appearance
- Opposite branching is a rare, high-value diagnostic for narrowing families
- Bark textures of Beech and Cherry
- Opposite branching and the MAD horse mnemonic
- Excurrent growth creates a single central leader like a Spruce or Fir
- Matching mature bark textures to their specific species identifiers
- Deliquescent growth results in the broad, vase-like shape of an Elm or Oak
- The 'habit' describes the characteristic silhouette formed by limb angles
- Using branching patterns to categorize tree families
- Terminal bud clusters are a primary indicator for the Oak genus
- Leaf scars contain vascular bundle traces that form unique patterns
- Bud scale shapes are consistent and species-specific during dormancy
You've tried the other tabs
Thirty open tabs. Four facts you actually kept.
You watched. You nodded. By Sunday it was gone.
One answer, then back to scrolling.
Eight weeks. You meant to finish. You didn't.
Tomo gives The Life of Trees the Duolingo treatment: levels, streaks, and quick quizzes that test what you just learned. That game loop is what the tabs above never had, so it's the one you actually finish.
Here's what playing it feels like
A real question from this course. Take your best guess.
If you are walking through a North American forest, what branching pattern are you most likely to encounter?
Get it right to open this lesson and 23 more in the app.
Where The Life of Trees takes you
- 1
Reading the Tree
- Identifying Trees Beyond the Leaf
- Decoding Tree Architecture
- 2
The Living System
- The Hydraulic Engine
- Seasonal Survival Strategies
- 3
The Forest Network
- The Underground Economy
- Defenses and Alliances
- 4
Trees in the Human Landscape
- Pruning for Health and Structure
- Diagnosing Tree Stress
4 sections · 8 units · 24 levels. Built to play, not to enroll.
Tomo is in ChatGPT
Tomo is also a ChatGPT plugin: the same playable courses, built and played inside your chat.
Add Tomo to ChatGPT- What to ask
- “Make me a Tomo course on black holes.” “Turn this chat into a Tomo course.”
- What you get
- Quick questions with instant feedback, hearts and stars, ready to play in about a minute.
- Where it goes
- No sign-up to start. Connect your Tomo account and your streak carries on in the app.
You pick the voice
The Life of Trees is taught in the Professor style: clear, structured, thorough. Want a different feel? In the app you can spin up the same topic in any of Tomo's teaching styles. Same facts, totally different vibe.
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Start The Life of Trees today.
Download Tomo, search The Life of Trees, and play your first lesson in under a minute.