We’re going to talk about collectibles today, but not the kind you score at a flea market or from an online auction. We’re going to talk about collectible trees. Yes, trees. A new book by Amy Stewart called “The Tree Collectors” introduces us to 50 people whose lives have been transformed by what she calls their “arboreal obsessions.” 

Amy, who’s based in Portland, Ore., is a “New York Times” bestselling author whose previous nonfiction books about the natural world also include “The Drunken Botanist,” and “Wicked Plants.” Her newest, “The Tree Collectors: Tales of Arboreal Obsession,” is out this month, and she joined me to talk about the people and trees she met in the process of writing it. 

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