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about
About Completely Arbortrary
This weekly podcast is a scientific look at trees and how they affect and are affected by everything, hosted by master arborist and environmental educator Casey Clapp and his tree-curious friend and musical artist Alex Crowson. Each episode features a tree from around the world and a discussion about its unique position in culture, ecology, and history. These discussions can range from urban forestry and evolutionary biology to folk mythology and popular culture. The hard science is framed in plenty of silliness, with a casual tone, games and parody songs, and the titular arbitrary numerical rating of the tree at the end of each episode.
This podcast's mission is to provide approachable science to audiences of all experience levels and reconnect people to the natural elements around them, whether deep in the forest or just outside their front door.
featured episodes
Take a look at what's inside
Featured Episodes
Princess Mononoke (Hinoke)
Dec 28, 2023
1h 31m
Can we interest you in a forest bath? On the series finale of Treeyazaki, we discuss Princess Mononoke and the hinoki cypress (Chamaecyparis obtusa). A tree ripe with VOCs (volatile organic compounds) and rich tradition such as forest bathing, this tree is a quintisential Japanese conifer.
More Episodes
Inside Sprout: Sadness (Weeping Cherry)
Mar 27
1h 17m
Inside Sprout: Anger (Jeffrey Pine)
Mar 20
1h 11m
Inside Sprout: Fear (Silver Maple)
Mar 13
1h 3m
Why are we so afraid of the silver maple (Acer saccharinum)? Perhaps because of the risk involved. In today’s episode of Inside Sprout, we discuss tree risk assessment as we ask ourselves the question: if a tree falls, and no one is around to see it, is there any risk?
Inside Sprout: Disgust (Black Locust)
Mar 06
50m
Welcome to Inside Sprout, a 5 part mini-series on trees that best embody and illicit our most basic human emotions. Today we start with disgust and the black locust (Robinia pseudoacacia). This tree is almost universally despised for its invasiveness, but has found a very important and loving niche for itself in the woodworking community.
Ball is Life (Rubber)
Feb 27
52m
Take me out to the ball game… the one where they bounce a solid rubber (Castilla elastica) ball between their hips. Today we take it way back for a discussion about rubber (the tree) and rubber (the substance) and an ancient ballgame that’s still played today.
Little Kid (Balsa)
Feb 20
46m
The lightest wood there is, the balsa (Ochroma pyramidale) is one excited little kid. It grows fast, has ice cream cone flowers, and you can even carry it around on your shoulders! But what gives this tree the ability to grow in such a famous way?
+ 288 more episodes
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