Completely Arbortrary
Tree advocate Casey Clapp and his tree-curious friend Alex Crowson bring you a podcast about trees and other related topics. History, culture, art, religion, science... trees affect and are affected by everything. Join Casey and Alex on their silly and educational journey to prove it.
About
Tree advocate Casey Clapp and his tree-curious friend Alex Crowson bring you a podcast about trees and other related topics. History, culture, art, religion, science... trees affect and are affected by everything. Join Casey and Alex on their silly and educational journey to prove it.

Ivory & (Ebony)
Dec 11, 2025·—
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work together in perfect harmony (guitar reference). Today, learn all about the ebony ( Diospyros ebenum ), it's typical path through capitalism, and the guitar luthier who gave it back to the world. Completely Arbortrary is produced and hosted by Casey Clapp and Alex Crowson Support the pod and become a Treemium Member Follow along on Instagram Find Arbortrary merch on our store Find additional reading on our website Cover art by Jillian Barthold Music by Aves and The Mini-Vandals See Privacy Policy at https://art19.com/privacy and California Privacy Notice at https://art19.com/privacy#do-not-sell-my-info .

The Odysseed (Lotus Tree)
Dec 4, 2025·—
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Hop aboard the good ship Odyssey to make for the island of the lotus tree ( Diospyros lotus ). But, could this be a case of mistaken idenitree?... Completely Arbortrary is produced and hosted by Casey Clapp and Alex Crowson Support the pod and become a Treemium Member Follow along on Instagram Find Arbortrary merch on our store Find additional reading on our website Cover art by Jillian Barthold Music by Aves and The Mini-Vandals See Privacy Policy at https://art19.com/privacy and California Privacy Notice at https://art19.com/privacy#do-not-sell-my-info .

Holiday Merch Sale + Urban Trees and Racism
Nov 27, 2025·—
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As we take a quick break we're here to remind you that our holiday merch sale ends ON BLACK FRIDAY, and reintroduce you to our talk on urban trees and racism. Completely Arbortrary is produced and hosted by Casey Clapp and Alex Crowson Support the pod and become a Treemium Member Follow along on Instagram Find Arbortrary merch on our store Find additional reading on our website Cover art by Jillian Barthold Music by Aves and The Mini-Vandals See Privacy Policy at https://art19.com/privacy and California Privacy Notice at https://art19.com/privacy#do-not-sell-my-info .

BONUS EPISODE: Fungus in the Fall
Nov 20, 2025·—
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As the boys take a much needed break from the wild world of modern podcasting, they present to you the audio from a 2023 livestream entitled Fungus in the Fall. Completely Arbortrary is produced and hosted by Casey Clapp and Alex Crowson Support the pod and become a Treemium Member Follow along on Instagram Find Arbortrary merch on our store Find additional reading on our website Cover art by Jillian Barthold Music by Aves and The Mini-Vandals See Privacy Policy at https://art19.com/privacy and California Privacy Notice at https://art19.com/privacy#do-not-sell-my-info .

Splitting Facts (Weeping Juniper)
Nov 13, 2025·—
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So many junipers, so little time. So let’s pick one! How about the weeping juniper ( Juniperus flaccida )? Buckle up, it’s gonna be a bumpy one. Completely Arbortrary is produced and hosted by Casey Clapp and Alex Crowson Support the pod and become a Treemium Member Follow along on Instagram Find Arbortrary merch on our store Find additional reading on our website Cover art by Jillian Barthold Music by Aves and The Mini-Vandals See Privacy Policy at https://art19.com/privacy and California Privacy Notice at https://art19.com/privacy#do-not-sell-my-info .

Goin' Thig Mode (Fraser Fir)
Nov 6, 2025·—
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The boys are joined by their first ever third host to discuss goin' thig mode with thigmomorphogenesis and the Fraser fir ( Abies fraseri ). Then, a test of Casey's binomial spelling skills with The Spelling Tree. Completely Arbortrary is produced and hosted by Casey Clapp and Alex Crowson Support the pod and become a Treemium Member Follow along on Instagram Find Arbortrary merch on our store Find additional reading on our website Cover art by Jillian Barthold Music by Aves and The Mini-Vandals See Privacy Policy at https://art19.com/privacy and California Privacy Notice at https://art19.com/privacy#do-not-sell-my-info .

Deal with the Devil (Bigleaf Magnolia)
Oct 30, 2025·—
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BEEware of the bigleaf magnolia ( Magnolia macrophylla ). This tree made such a strong alliance with beetles, that any other insect trying to get in gets KILLED. Then we play a Halloween edition of Family Tree! Completely Arbortrary is produced and hosted by Casey Clapp and Alex Crowson Support the pod and become a Treemium Member Follow along on Instagram Find Arbortrary merch on our store Find additional reading on our website Cover art by Jillian Barthold Music by Aves and The Mini-Vandals See Privacy Policy at https://art19.com/privacy and California Privacy Notice at https://art19.com/privacy#do-not-sell-my-info .

Lil' Apple Make This Horse Go Crazy (Manzanilla de la Muerte)
Oct 23, 2025·—
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DO NOT TOUCH this week’s tree ( Hippomane mancinella ), it makes horses go crazy! Completely Arbortrary is produced and hosted by Casey Clapp and Alex Crowson Support the pod and become a Treemium Member Follow along on Instagram Find Arbortrary merch on our store Find additional reading on our website Cover art by Jillian Barthold Music by Aves and The Mini-Vandals See Privacy Policy at https://art19.com/privacy and California Privacy Notice at https://art19.com/privacy#do-not-sell-my-info .

Mummy and Me (Coffintree)
Oct 16, 2025·—
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We need a tall, straight, decay-resistant, fragrant wood… call THE COFFINTREE ( Taiwania cryptomerioides ). Why has this tree been used consistently for coffin wood?…. Nobody knows (including us!). Completely Arbortrary is produced and hosted by Casey Clapp and Alex Crowson Support the pod and become a Treemium Member Follow along on Instagram Find Arbortrary merch on our store Find additional reading on our website Cover art by Jillian Barthold Music by Aves and The Mini-Vandals See Privacy Policy at https://art19.com/privacy and California Privacy Notice at https://art19.com/privacy#do-not-sell-my-info .

Creature from the Black Tea Lagoon (Swamp Tupelo)
Oct 9, 2025·—
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Out of the black tea lagoon comes a swamp monster! It’s the swamp tupelo ( Nyssa biflora )—swollen butt and all—who has learned how to breathe… underwater. Completely Arbortrary is produced and hosted by Casey Clapp and Alex Crowson Support the pod and become a Treemium Member Follow along on Instagram Find Arbortrary merch on our store Find additional reading on our website Cover art by Jillian Barthold Music by Aves and The Mini-Vandals See Privacy Policy at https://art19.com/privacy and California Privacy Notice at https://art19.com/privacy#do-not-sell-my-info .

Sectored Architecture (Rocky Mountain Bristlecone Pine)
Oct 2, 2025·—
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What if your left foot was in charge of keeping your left hand alive? What if your right big toe was responsible for the right ear? With sectored architecture, the future is now! (Actually, it's about 2000 years ago). Join us for a discussion of the Rocky Mountain bristlecone pine ( Pinus aristata ) and remember to use coupon code BLOWOUT for 30% off everything at arbortrarypod.com/merch Completely Arbortrary is produced and hosted by Casey Clapp and Alex Crowson Support the pod and become a Treemium Member Follow along on Instagram Find Arbortrary merch on our store Find additional reading on our website Cover art by Jillian Barthold Music by Aves and The Mini-Vandals See Privacy Policy at https://art19.com/privacy and California Privacy Notice at https://art19.com/privacy#do-not-sell-my-info .

Pavlova (The Fruit That Serves Itself)
Sep 25, 2025·—
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The maracuya, the passionfruit, the fruit that serves itself ( Passiflora lindeniana ) produces one of the best fruits in the world (unbiased opinion), which lends its flavor to one of the best desserts in the world (unbiased opinion). Completely Arbortrary is produced and hosted by Casey Clapp and Alex Crowson Support the pod and become a Treemium Member Follow along on Instagram Find Arbortrary merch on our store Find additional reading on our website Cover art by Jillian Barthold Music by Aves and The Mini-Vandals See Privacy Policy at https://art19.com/privacy and California Privacy Notice at https://art19.com/privacy#do-not-sell-my-info .

Zwetschgenkuchen (European Plum)
Sep 18, 2025·—
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Did you save room for dessert? We're having zwetschgenkuchen, or German plum cake, made with the European plum ( Prunus domestica ). Completely Arbortrary is produced and hosted by Casey Clapp and Alex Crowson Support the pod and become a Treemium Member Follow along on Instagram Find Arbortrary merch on our store Find additional reading on our website Cover art by Jillian Barthold Music by Aves and The Mini-Vandals See Privacy Policy at https://art19.com/privacy and California Privacy Notice at https://art19.com/privacy#do-not-sell-my-info .

Baesuk (Asian Pear)
Sep 11, 2025·—
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Asian pear ( Pyrus pyrifolia ) is the centerpiece of a Korean dish called baesuk; a dessert even Frankenstein would love. Completely Arbortrary is produced and hosted by Casey Clapp and Alex Crowson Support the pod and become a Treemium Member Follow along on Instagram Find Arbortrary merch on our store Find additional reading on our website Cover art by Jillian Barthold Music by Aves and The Mini-Vandals See Privacy Policy at https://art19.com/privacy and California Privacy Notice at https://art19.com/privacy#do-not-sell-my-info .

Baklava (Pistachio)
Sep 4, 2025·—
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It's Plant Based Diet: Just Desserts, where we talk about 4 of the world's sweetest trees. First up, the pistachio! ( Pistacia vera ) Hear all about its origins in the Middle East and the dessert that made it famous: baklava. Completely Arbortrary is produced and hosted by Casey Clapp and Alex Crowson Support the pod and become a Treemium Member Follow along on Instagram Find Arbortrary merch on our store Find additional reading on our website Cover art by Jillian Barthold Music by Aves and The Mini-Vandals See Privacy Policy at https://art19.com/privacy and California Privacy Notice at https://art19.com/privacy#do-not-sell-my-info .

Buzz Pollination (Bigberry Manzanita)
Aug 28, 2025·—
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Buzz buzz! Let’s connect some pollen the new fashioned way with the Bigberry Manzanita ( Arctostaphylos glauca ). Completely Arbortrary is produced and hosted by Casey Clapp and Alex Crowson Support the pod and become a Treemium Member Follow along on Instagram Find Arbortrary merch on our store Find additional reading on our website Cover art by Jillian Barthold Music by Aves and The Mini-Vandals See Privacy Policy at https://art19.com/privacy and California Privacy Notice at https://art19.com/privacy#do-not-sell-my-info .

BONUS EPISODE: What is Bark? + Alex's Hawaiian Adventure
Aug 21, 2025·—
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What's up Fungal Associates!? This week we have part 2 of our bonus episode fortnight and bring you "What is Bark?" Which asks the question.... well, what is bark? We'll see you next week with new episodes! See Privacy Policy at https://art19.com/privacy and California Privacy Notice at https://art19.com/privacy#do-not-sell-my-info .

BONUS EPISODE: What is Soil? + Casey's Throat Catastrophe
Aug 14, 2025·—
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What's up Fungal Associates! For the next two weeks we bring you some OLD SCHOOL bonus episodes (circa 2021). Why? Well, because Casey took a frisbee to the throat, and Alex took a vacation to Hawaii. Classic! Enjoy this break as I know we will <3 See Privacy Policy at https://art19.com/privacy and California Privacy Notice at https://art19.com/privacy#do-not-sell-my-info .

All Trees Go To Heaven (American Beech)
Aug 7, 2025·—
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I think, therefore I am... a tree - American Beech ( Fagus grandifolia ) Completely Arbortrary is produced and hosted by Casey Clapp and Alex Crowson Support the pod and become a Treemium Member Follow along on Instagram Find Arbortrary merch on our store Find additional reading on our website Cover art by Jillian Barthold Music by Aves and The Mini-Vandals See Privacy Policy at https://art19.com/privacy and California Privacy Notice at https://art19.com/privacy#do-not-sell-my-info .

Keyaki (Japanese Zelkova)
Jul 31, 2025·—
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The tree you don’t know that you know, but you know it! The Japanese zelkova ( Zelkova serrata ) is the center of a fascinating tale of isolationism, plant espionage, and gunboat diplomacy. Completely Arbortrary is produced and hosted by Casey Clapp and Alex Crowson Support the pod and become a Treemium Member Follow along on Instagram Find Arbortrary merch on our store Find additional reading on our website Cover art by Jillian Barthold Music by Aves and The Mini-Vandals See Privacy Policy at https://art19.com/privacy and California Privacy Notice at https://art19.com/privacy#do-not-sell-my-info .

Insultivar (Chokecherry)
Jul 24, 2025·—
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Don't go chokin' on this cherry ( Prunus virginiana ) or else you may turn red! And Canadian! Completely Arbortrary is produced and hosted by Casey Clapp and Alex Crowson Support the pod and become a Treemium Member Follow along on Instagram Find Arbortrary merch on our store Find additional reading on our website Cover art by Jillian Barthold Music by Aves and The Mini-Vandals See Privacy Policy at https://art19.com/privacy and California Privacy Notice at https://art19.com/privacy#do-not-sell-my-info .

Dial M for (Maxipiñon)
Jul 17, 2025·—
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A mystery cone… a mystery tree! What the maxipiñon has to say about genetic bottlenecking may unlock its secrets! Completely Arbortrary is produced and hosted by Casey Clapp and Alex Crowson Support the pod and become a Treemium Member Follow along on Instagram Find Arbortrary merch on our store Find additional reading on our website Cover art by Jillian Barthold Music by Aves and The Mini-Vandals See Privacy Policy at https://art19.com/privacy and California Privacy Notice at https://art19.com/privacy#do-not-sell-my-info .

Zombie Survivors (Vietnam Cypress)
Jul 10, 2025·—
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What happens when trees have to run for their lives and the only way is up? The Vietnam cypress ( Xanthocyparis vietnamensis ), that's what! Completely Arbortrary is produced and hosted by Casey Clapp and Alex Crowson Support the pod and become a Treemium Member Follow along on Instagram Find Arbortrary merch on our store Find additional reading on our website Cover art by Jillian Barthold Music by Aves and The Mini-Vandals See Privacy Policy at https://art19.com/privacy and California Privacy Notice at https://art19.com/privacy#do-not-sell-my-info .

There's Always Money in the (Banana Tree)
Jul 3, 2025·—
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It’s a BANANZA with the banana ( Musa acuminata) , a fruit so popular that it helped shape the political landscape of the world. Completely Arbortrary is produced and hosted by Casey Clapp and Alex Crowson Support the pod and become a Treemium Member Follow along on Instagram Find Arbortrary merch on our store Find additional reading on our website Cover art by Jillian Barthold Music by Aves and The Mini-Vandals See Privacy Policy at https://art19.com/privacy and California Privacy Notice at https://art19.com/privacy#do-not-sell-my-info .

The Lean (Cook Island Pine)
Jun 26, 2025·—
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Lazy, back problems, or just a Fonzie-esque casual attitude? Whatever the reason, the Cook Island pine ( Araucaria columnaris ) leans mysteriously toward the equator. Let’s discuss the possibilities! Then, we play a game about Filipino pines and oaks—The Filipineoak Affair. Completely Arbortrary is produced and hosted by Casey Clapp and Alex Crowson Support the pod and become a Treemium Member Follow along on Instagram Find Arbortrary merch on our store Find additional reading on our website Cover art by Jillian Barthold Music by Aves and The Mini-Vandals See Privacy Policy at https://art19.com/privacy and California Privacy Notice at https://art19.com/privacy#do-not-sell-my-info .


